HighCVE-2026-3012

    Samba: group policy certificate enrollment uses http:// without validation (CVE-2026-3012)

    Published Last modified Sources: SUSE, Red Hat, Debian, Debian LTS, Ubuntu, BSI, CVE.org, EUVD

    What is affected, what to do

    A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification.

    Update Red Hat Enterprise Linux 10 to version 0:4.23.5-109.el10_2, Red Hat Enterprise Linux 10.0 Extended Update Support to version 0:4.21.3-114.el10_0.1, Red Hat Enterprise Linux 8 to version 0:4.19.4-16.el8_10.

    Affected
    • Red Hat Enterprise Linux 10 lt *..0:4.23.5-109.el10_2
    • Red Hat Enterprise Linux 10.0 Extended Update Support lt *..0:4.21.3-114.el10_0.1
    • Red Hat Enterprise Linux 8 lt *..0:4.19.4-16.el8_10
    • Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support lt *..0:4.15.5-16.el8_6.1
    • Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On lt *..0:4.15.5-16.el8_6.1
    • Red Hat Enterprise Linux 8.8 Telecommunications Update Service lt *..0:4.17.5-7.el8_8.1
    • Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions lt *..0:4.17.5-7.el8_8.1
    • Red Hat Enterprise Linux 9 lt *..0:4.23.5-10.el9_8
    • Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions lt *..0:4.17.5-105.el9_2.5
    • Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions lt *..0:4.19.4-105.el9_4.4
    • Red Hat Enterprise Linux 9.6 Extended Update Support lt *..0:4.21.3-14.el9_6.1
    • Red Hat OpenShift Container Platform 4.12 lt *..412.86.202608241157-0
    • Red Hat OpenShift Container Platform 4.12 lt *..412.86.202609082051-0
    • Red Hat OpenShift Container Platform 4.13 lt *..413.92.202609080414-0
    • Red Hat OpenShift Container Platform 4.13 lt *..413.92.202609302032-0
    • Red Hat OpenShift Container Platform 4.14 lt *..414.92.202608172040-0
    • Red Hat OpenShift Container Platform 4.14 lt *..414.92.202609011250-0
    • Red Hat OpenShift Container Platform 4.15 lt *..415.92.202608180329-0
    • Red Hat OpenShift Container Platform 4.15 lt *..415.92.202609140326-0
    • Red Hat OpenShift Container Platform 4.16 lt *..416.94.202608150307-0
    • Red Hat OpenShift Container Platform 4.16 lt *..416.94.202609011112-0
    • Red Hat OpenShift Container Platform 4.17 lt *..417.94.202608250221-0
    • Red Hat OpenShift Container Platform 4.17 lt *..417.94.202609191027-0
    • Red Hat OpenShift Container Platform 4.18 lt *..418.94.202608142238-0
    • Red Hat OpenShift Container Platform 4.18 lt *..418.94.202609031320-0
    • Red Hat OpenShift Container Platform 4.19 lt *..4.19.9.6.202606241344-0
    Fixed in
    • Red Hat Enterprise Linux 10 0:4.23.5-109.el10_2
    • Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.21.3-114.el10_0.1
    • Red Hat Enterprise Linux 8 0:4.19.4-16.el8_10
    • Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.15.5-16.el8_6.1
    • Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.15.5-16.el8_6.1
    • Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.17.5-7.el8_8.1
    • Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.17.5-7.el8_8.1
    • Red Hat Enterprise Linux 9 0:4.23.5-10.el9_8
    • Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.17.5-105.el9_2.5
    • Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:4.19.4-105.el9_4.4
    • Red Hat Enterprise Linux 9.6 Extended Update Support 0:4.21.3-14.el9_6.1
    • Red Hat OpenShift Container Platform 4.12 412.86.202608241157-0
    • Red Hat OpenShift Container Platform 4.12 412.86.202609082051-0
    • Red Hat OpenShift Container Platform 4.13 413.92.202609080414-0
    • Red Hat OpenShift Container Platform 4.13 413.92.202609302032-0
    • Red Hat OpenShift Container Platform 4.14 414.92.202608172040-0
    • Red Hat OpenShift Container Platform 4.14 414.92.202609011250-0
    • Red Hat OpenShift Container Platform 4.15 415.92.202608180329-0
    • Red Hat OpenShift Container Platform 4.15 415.92.202609140326-0
    • Red Hat OpenShift Container Platform 4.16 416.94.202608150307-0
    • Red Hat OpenShift Container Platform 4.16 416.94.202609011112-0
    • Red Hat OpenShift Container Platform 4.17 417.94.202608250221-0
    • Red Hat OpenShift Container Platform 4.17 417.94.202609191027-0
    • Red Hat OpenShift Container Platform 4.18 418.94.202608142238-0
    • Red Hat OpenShift Container Platform 4.18 418.94.202609031320-0
    • Red Hat OpenShift Container Platform 4.19 4.19.9.6.202606241344-0

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    8.0

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v3

    6.8

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: SUSE, Red Hat, Debian, Debian LTS, Ubuntu, BSI, CVE.org, EUVD

    0.3 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 17.9

    Show all metrics
    Severity
    High
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    54.57 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    8.0 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    6.8
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.3 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    17.9
    Elevated — this CVE ranks above at least 10% of all CVEs scored today.
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · not automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 27 May 2026
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-345, CWE-345

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.

    Source: suse_csaf, redhat_csaf, Debian Security Advisories, Debian LTS Advisories, Ubuntu Security Notices, BSI WID Portal, BSI CSAF, NVD (NIST), cvelistv5, CVE.org (MITRE), ENISA EUVD

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    Red HatRed Hat Enterprise Linux 10
    • < 0:4.23.5-109.el10_2
    • 0:4.23.5-109.el10_2
    Red HatRed Hat Enterprise Linux 10.0 Extended Update Support
    • < 0:4.21.3-114.el10_0.1
    • 0:4.21.3-114.el10_0.1
    Red HatRed Hat Enterprise Linux 6
    • —
    • —
    Red HatRed Hat Enterprise Linux 7
    • —
    • —
    Red HatRed Hat Enterprise Linux 8
    • < 0:4.19.4-16.el8_10
    • 0:4.19.4-16.el8_10
    Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
    • < 0:4.15.5-16.el8_6.1
    • 0:4.15.5-16.el8_6.1
    Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
    • < 0:4.15.5-16.el8_6.1
    • 0:4.15.5-16.el8_6.1
    Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service
    • < 0:4.17.5-7.el8_8.1
    • 0:4.17.5-7.el8_8.1
    Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions
    • < 0:4.17.5-7.el8_8.1
    • 0:4.17.5-7.el8_8.1
    Red HatRed Hat Enterprise Linux 9
    • < 0:4.23.5-10.el9_8
    • 0:4.23.5-10.el9_8
    Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions
    • < 0:4.17.5-105.el9_2.5
    • 0:4.17.5-105.el9_2.5
    Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions
    • < 0:4.19.4-105.el9_4.4
    • 0:4.19.4-105.el9_4.4
    Red HatRed Hat Enterprise Linux 9.6 Extended Update Support
    • < 0:4.21.3-14.el9_6.1
    • 0:4.21.3-14.el9_6.1
    Red HatRed Hat OpenShift Container Platform 4.12
    • < 412.86.202608241157-0
    • < 412.86.202609082051-0
    • 412.86.202608241157-0
    • 412.86.202609082051-0
    Red HatRed Hat OpenShift Container Platform 4.13
    • < 413.92.202609080414-0
    • < 413.92.202609302032-0
    • 413.92.202609080414-0
    • 413.92.202609302032-0
    Red HatRed Hat OpenShift Container Platform 4.14
    • < 414.92.202609011250-0
    • < 414.92.202608172040-0
    • 414.92.202609011250-0
    • 414.92.202608172040-0
    Red HatRed Hat OpenShift Container Platform 4.15
    • < 415.92.202608180329-0
    • < 415.92.202609140326-0
    • 415.92.202608180329-0
    • 415.92.202609140326-0
    Red HatRed Hat OpenShift Container Platform 4.16
    • < 416.94.202609011112-0
    • < 416.94.202608150307-0
    • 416.94.202609011112-0
    • 416.94.202608150307-0
    Red HatRed Hat OpenShift Container Platform 4.17
    • < 417.94.202609191027-0
    • < 417.94.202608250221-0
    • 417.94.202609191027-0
    • 417.94.202608250221-0
    Red HatRed Hat OpenShift Container Platform 4.18
    • < 418.94.202609031320-0
    • < 418.94.202608142238-0
    • 418.94.202609031320-0
    • 418.94.202608142238-0
    Red HatRed Hat OpenShift Container Platform 4.19
    • < 4.19.9.6.202606241344-0
    • 4.19.9.6.202606241344-0
    redhatopenshift_container_platform
    • 4.0
    • —
    sambasamba
    • 4.16.0 – < 4.21.0
    • 4.21.0
    Open SourceSamba
    • < 4.24.3
    • < 4.22.10
    • < 4.23.8
    • 4.24.3
    • 4.22.10
    • 4.23.8

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxredhatenterprise_linux7.0
    Linuxredhatenterprise_linux9.0
    Linuxdebiansambabookworm
    Linuxdebiansambabullseye
    Linuxdebiansambatrixie

    Weakness classes (CWE)

    • CWE-345Insufficient Verification of Data Authenticity

      Class

      The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

      Entry at MITRE CWE-345

    • CWE-345Insufficient Verification of Data Authenticity

      Class

      The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

      Entry at MITRE CWE-345

    References & sources

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:77320

      Source identifier: secalert@redhat.com

    2. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>

      Source identifier: secalert@redhat.com

    3. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:70586

      Source identifier: secalert@redhat.com

    4. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:67857

      Source identifier: secalert@redhat.com

    5. Record modifiedRed Hat ADP

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:65839

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    Show 22 older changes

    1. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:65839

      Source identifier: secalert@redhat.com

    2. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:65907

      Source identifier: secalert@redhat.com

    3. Record modifiedRed Hat ADP

      Show 3 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:65851
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:65907

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    4. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:65851

      Source identifier: secalert@redhat.com

    5. Record modifiedRed Hat ADP

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:62409

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    6. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:62409

      Source identifier: secalert@redhat.com

    7. Record modifiedRed Hat ADP

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:62549

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    8. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:62549

      Source identifier: secalert@redhat.com

    9. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:59831

      Source identifier: secalert@redhat.com

    10. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>

      Source identifier: secalert@redhat.com

    11. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>

      Source identifier: secalert@redhat.com

    12. Record modifiedRed Hat ADP

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:56786
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:56853
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:56911

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    13. Record modifiedRed Hat

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:56786
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:56853
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:56911

      Source identifier: secalert@redhat.com

    14. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/3xxx/CVE-2026-3012.json">CVE-2026-3012</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:57483

      Source identifier: secalert@redhat.com

    15. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)changed
      Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8 (+14)
      Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8 (+15)

      Source identifier: secalert@redhat.com

    16. Record modifiedRed Hat ADP

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:29863
      Affected versions (publisher)changed
      Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8) (+31)
      Red Hat OpenShift Container Platform 4.19, Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream (v. 10) (+31)

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    17. Record modifiedRed Hat

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:29863
      Affected versions (publisher)changed
      Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8 (+14)
      Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8 (+14)

      Source identifier: secalert@redhat.com

    18. Record modifiedRed Hat

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:28054
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:28055
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:28056
      Affected versions (publisher)changed
      Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 (+9)
      Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8 (+13)

      Source identifier: secalert@redhat.com

    19. Record modifiedRed Hat

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:25979

      Source identifier: secalert@redhat.com

    20. Record modifiedRed Hat

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:25049

      Source identifier: secalert@redhat.com

    21. Reanalysis by NVDNVD

      Product mapping changed:
      Show 3 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Product configurationchanged
      OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.1.0
      OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.16.0 up to (excluding) 4.21.0
      Reference typechanged
      Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3012 Types: Mitigation, Vendor Advisory
      Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3012 Types: Mitigation, Third Party Advisory
      Reference typechanged
      Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2447319 Types: Issue Tracking, Vendor Advisory
      Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2447319 Types: Issue Tracking, Third Party Advisory

      Source identifier: nvd@nist.gov

    22. Initial analysis by NVDNVD

      Newly listed as affected:

      CVSS V3.1: AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

      Show 7 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
      Product configurationadded
      —
      OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.1.0
      Reference typeadded
      —
      Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:22644 Types: Issue Tracking
      Reference typeadded
      —
      Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:22963 Types: Issue Tracking
      Reference typeadded
      —
      Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3012 Types: Mitigation, Vendor Advisory
      Reference typeadded
      —
      Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2447319 Types: Issue Tracking, Vendor Advisory
      Reference typeadded
      —
      Red Hat, Inc.: https://bugzilla.samba.org/show_bug.cgi?id=16003 Types: Issue Tracking, Mitigation, Vendor Advisory

      Source identifier: nvd@nist.gov

    One NVD translation into another language is hidden.

    Embed badge

    Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.

    Badge preview for CVE-2026-3012
    <a href="https://intel.neosec.eu/en/cve/CVE-2026-3012"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-3012.svg?lang=en" alt="CVE-2026-3012 – NEOSEC Intel" height="20"></a>