CriticalCVE-2026-72065

    Linux Kernel: Improper Input Validation (CVE-2026-72065)

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

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    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: net: mana: Validate the packet length reported by the NIC Validate the packet length reported in the RX CQE before passing it to skb processing. The CQE is supplied by the NIC device and should not be blindly trusted.

    Update Linux Kernel to version 5.15.217, Linux Kernel to version 6.1.184, Linux Kernel to version 6.6.148.

    Affected
    • Linux Kernel lt 5.13..5.15.217
    • Linux Kernel lt 5.16..6.1.184
    • Linux Kernel lt 6.2..6.6.148
    • Linux Kernel lt 6.7..6.12.101
    • Linux Kernel lt 6.13..6.18.42
    • Linux Kernel lt 6.19..7.1.5
    Fixed in
    • Linux Kernel 5.15.217
    • Linux Kernel 6.1.184
    • Linux Kernel 6.6.148
    • Linux Kernel 6.12.101
    • Linux Kernel 6.18.42
    • Linux Kernel 7.1.5
    • Linux Kernel 7.2

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

    Metrics

    9.8

    Priority

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

    Source: Vendor (CNA), CVSS v3

    9.8

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: Ubuntu, Debian LTS, CVE.org, SUSE, BSI

    0.7 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 54.3

    Show all metrics
    Severity
    Critical
    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
    95.24 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
    9.8 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
    9.8
    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
    0.7 %
    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
    54.3
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    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 · automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 16 October 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-20

    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

    In the Linux kernel, the following vulnerability has been resolved: net: mana: Validate the packet length reported by the NIC Validate the packet length reported in the RX CQE before passing it to skb processing. The CQE is supplied by the NIC device and should not be blindly trusted.

    Source: Ubuntu Security Notices, Debian LTS Advisories, NVD (NIST), cvelistv5, suse_csaf, BSI WID Portal, BSI CSAF

    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
    LinuxLinux
    • 6.7 – < 6.12.101
    • 5.13 – < 5.15.217
    • 6.19 – < 7.1.5
    • 6.2 – < 6.6.148
    • 6.13 – < 6.18.42
    • 5.16 – < 6.1.184
    • —
    • 6.12.101
    • 5.15.217
    • 7.1.5
    • 6.6.148
    • 6.18.42
    • 6.1.184
    • 7.2

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianlinuxbookworm
    Linuxubuntulinuxjammy
    Linuxubuntulinuxnoble
    Linuxubuntulinuxresolute
    Linuxdebianlinux-6.12bookworm
    Linuxubuntulinux-awsjammy
    Linuxubuntulinux-awsnoble
    Linuxubuntulinux-awsresolute
    Linuxubuntulinux-aws-5.15focal
    Linuxubuntulinux-aws-7.0noble
    Linuxubuntulinux-aws-fipsjammy
    Linuxubuntulinux-aws-fipsnoble
    Linuxubuntulinux-azurejammy
    Linuxubuntulinux-azurenoble
    Linuxubuntulinux-azureresolute
    Linuxubuntulinux-azure-5.15focal
    Linuxubuntulinux-azure-6.8jammy
    Linuxubuntulinux-azure-7.0noble
    Linuxubuntulinux-azure-fdenoble
    Linuxubuntulinux-azure-fderesolute
    Linuxubuntulinux-azure-fde-5.15focal
    Linuxubuntulinux-azure-fde-6.8jammy
    Linuxubuntulinux-azure-fde-7.0noble
    Linuxubuntulinux-azure-fipsjammy

    Weakness classes (CWE)

    • CWE-20Improper Input Validation

      Class

      The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

      Entry at MITRE CWE-20

    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 modifiedCISA ADP

      Weakness type: CWE-20

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Weakness type (CWE)added
      —
      CWE-20

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    2. Record modifiedLinux

      Show 14 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/282c5214ca4eb3799158c76782646e86d2945d1b
      Referenceadded
      —
      https://git.kernel.org/stable/c/2e276b14b6d378372bf0152df89286cbe7632fb0
      Referenceadded
      —
      https://git.kernel.org/stable/c/2e2a83b4998af4384e677d3b2ac08565274279bf
      Referenceadded
      —
      https://git.kernel.org/stable/c/6080189291d958604dcefe513a13900835ac982f
      Referenceadded
      —
      https://git.kernel.org/stable/c/6d13eaa13341a8f80aaf86f78591e1b1d393711d
      Referenceadded
      —
      https://git.kernel.org/stable/c/a631f82f89c76084ad5b2b9c043d3b391ffa56d8
      Referenceadded
      —
      https://git.kernel.org/stable/c/d2568e64d01f480200063fadd67d6938f676c66f
      Referenceremoved
      https://git.kernel.org/stable/c/282c5214ca4eb3799158c76782646e86d2945d1b
      —
      Referenceremoved
      https://git.kernel.org/stable/c/2e276b14b6d378372bf0152df89286cbe7632fb0
      —
      Referenceremoved
      https://git.kernel.org/stable/c/2e2a83b4998af4384e677d3b2ac08565274279bf
      —
      Referenceremoved
      https://git.kernel.org/stable/c/6080189291d958604dcefe513a13900835ac982f
      —
      Referenceremoved
      https://git.kernel.org/stable/c/6d13eaa13341a8f80aaf86f78591e1b1d393711d
      —
      Referenceremoved
      https://git.kernel.org/stable/c/a631f82f89c76084ad5b2b9c043d3b391ffa56d8
      —
      Referenceremoved
      https://git.kernel.org/stable/c/d2568e64d01f480200063fadd67d6938f676c66f
      —

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    3. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-72065","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:51:13.370480Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    4. Record modifiedLinux

      Show 3 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/a631f82f89c76084ad5b2b9c043d3b391ffa56d8
      Referenceadded
      —
      https://git.kernel.org/stable/c/d2568e64d01f480200063fadd67d6938f676c66f
      Affected versions (publisher)changed
      Linux, Linux
      Linux, Linux

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    5. Record modifiedLinux

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

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
      Affected versions (publisher)changed
      Linux, Linux
      Linux, Linux

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Show one older change

    1. ReceivedLinux

      Description added or changed

      Show 7 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Linux, Linux
      Descriptionadded
      —
      In the Linux kernel, the following vulnerability has been resolved: net: mana: Validate the packet length reported by the NIC Validate the packet length reported in the RX CQE before passing it to skb processing. The CQE is supplied by the NIC device and should not be blindly trusted.
      Referenceadded
      —
      https://git.kernel.org/stable/c/282c5214ca4eb3799158c76782646e86d2945d1b
      Referenceadded
      —
      https://git.kernel.org/stable/c/2e276b14b6d378372bf0152df89286cbe7632fb0
      Referenceadded
      —
      https://git.kernel.org/stable/c/2e2a83b4998af4384e677d3b2ac08565274279bf
      Referenceadded
      —
      https://git.kernel.org/stable/c/6080189291d958604dcefe513a13900835ac982f
      Referenceadded
      —
      https://git.kernel.org/stable/c/6d13eaa13341a8f80aaf86f78591e1b1d393711d

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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