CriticalCVE-2026-7374

    Kubevirt: Link Following (CVE-2026-7374)

    Published Last modified Sources: OSV, CVE.org, BSI, Msrc Update Guide, EUVD

    What is affected, what to do

    A flaw was found in KubeVirt's virt-handler component. This vulnerability allows an authenticated OpenShift user with edit permissions in a single namespace to exploit improper symlink validation when connecting to virtual machine console sockets.

    Update Kubevirt to version 1.6.6, Kubevirt to version 1.7.4, Kubevirt to version 1.8.3.

    Affected
    • Kubevirt lt *..1.6.6
    • Kubevirt lt 1.7.0..1.7.4
    • Kubevirt lt 1.8.0..1.8.3
    • Red Hat Container Native Virtualization 4.12 lt *..1779375376
    • Red Hat Container Native Virtualization 4.13 lt *..1778999881
    • Red Hat Container Native Virtualization 4.14 lt *..1779321599
    • Red Hat Container Native Virtualization 4.15 lt *..1778859977
    • Red Hat Container Native Virtualization 4.16 lt *..1778861274
    • Red Hat Container Native Virtualization 4.17 lt *..1779174925
    • Red Hat Container Native Virtualization 4.18 lt *..1778887155
    • Red Hat Container Native Virtualization 4.19 lt *..1779289071
    • Red Hat Container Native Virtualization 4.20 lt *..1779288737
    • Red Hat Container Native Virtualization 4.21 lt *..1779420069
    Fixed in
    • Kubevirt 1.6.6
    • Kubevirt 1.7.4
    • Kubevirt 1.8.3
    • Red Hat Container Native Virtualization 4.12 1779375376
    • Red Hat Container Native Virtualization 4.13 1778999881
    • Red Hat Container Native Virtualization 4.14 1779321599
    • Red Hat Container Native Virtualization 4.15 1778859977
    • Red Hat Container Native Virtualization 4.16 1778861274
    • Red Hat Container Native Virtualization 4.17 1779174925
    • Red Hat Container Native Virtualization 4.18 1778887155
    • Red Hat Container Native Virtualization 4.19 1779289071
    • Red Hat Container Native Virtualization 4.20 1779288737
    • Red Hat Container Native Virtualization 4.21 1779420069

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

    Metrics

    9.9

    Priority

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

    Source: NVD, CVSS v3

    9.9

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: OSV, CVE.org, BSI, Msrc Update Guide, EUVD

    0.7 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 54.4

    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
    93.80 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
    9.9 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
    9.9
    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
    54.4
    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
    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-59

    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 KubeVirt's virt-handler component. This vulnerability allows an authenticated OpenShift user with edit permissions in a single namespace to exploit improper symlink validation when connecting to virtual machine console sockets. By replacing the console socket with a symlink to the host's container runtime (CRI-O) socket, an attacker can hijack virt-handler's privileged connection. This enables the attacker to access any Unix socket on the host, potentially leading to full control of the node and the entire cluster.

    Source: OSV (Open Source Vulnerabilities), NVD (NIST), CVE.org (MITRE), BSI WID Portal, BSI CSAF, Microsoft Security Update Guide, cvelistv5, 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
    —kubevirt
    • 1.8.0 – < 1.8.3
    • < 1.6.6
    • 1.7.0 – < 1.7.4
    • 1.8.3
    • 1.6.6
    • 1.7.4
    Red HatRed Hat Container Native Virtualization 4.12
    • < 1779375376
    • 1779375376
    Red HatRed Hat Container Native Virtualization 4.13
    • < 1778999881
    • 1778999881
    Red HatRed Hat Container Native Virtualization 4.14
    • < 1779321599
    • 1779321599
    Red HatRed Hat Container Native Virtualization 4.15
    • < 1778859977
    • 1778859977
    Red HatRed Hat Container Native Virtualization 4.16
    • < 1778861274
    • 1778861274
    Red HatRed Hat Container Native Virtualization 4.17
    • < 1779174925
    • 1779174925
    Red HatRed Hat Container Native Virtualization 4.18
    • < 1778887155
    • 1778887155
    Red HatRed Hat Container Native Virtualization 4.19
    • < 1779289071
    • 1779289071
    Red HatRed Hat Container Native Virtualization 4.20
    • < 1779288737
    • 1779288737
    Red HatRed Hat Container Native Virtualization 4.21
    • < 1779420069
    • 1779420069
    Red HatOpenShift
    • Virtualization 4.19
    • Virtualization 4.13
    • Virtualization 4.21
    • Virtualization 4.14
    • Virtualization 4.18
    • Virtualization 4.20
    • Virtualization 4.15
    • Virtualization 4.16
    • Virtualization 4.17
    • Virtualization 4.12
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    gokubevirt.io/kubevirt
    • 1.8.0-alpha.0
    • —
    • 1.7.0-alpha.0
    • —
    • —
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-59Improper Link Resolution Before File Access ('Link Following')

      Base

      The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

      Entry at MITRE CWE-59

    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 ADP

      1 individual change: Affected versions (publisher)

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      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/7xxx/CVE-2026-7374.json">CVE-2026-7374</a>

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

    2. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

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      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/7xxx/CVE-2026-7374.json">CVE-2026-7374</a>

      Source identifier: secalert@redhat.com

    3. Record modifiedRed Hat ADP

      1 individual change: Affected versions (publisher)

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      Individual changes of this event as published by NVD
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      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/7xxx/CVE-2026-7374.json">CVE-2026-7374</a>

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

    4. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

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      TypeActionBeforeAfter
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      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/7xxx/CVE-2026-7374.json">CVE-2026-7374</a>

      Source identifier: secalert@redhat.com

    5. Record modifiedRed Hat

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      https://access.redhat.com/errata/RHSA-2026:20720
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      https://access.redhat.com/security/cve/CVE-2026-7374
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      https://bugzilla.redhat.com/show_bug.cgi?id=2463728
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      https://bugzilla.redhat.com/show_bug.cgi?id=2463728
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      Source identifier: secalert@redhat.com

    Show 16 older changes

    1. Record modifiedRed Hat ADP

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      https://access.redhat.com/errata/RHSA-2026:20720
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      https://access.redhat.com/errata/RHSA-2026:20736
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      https://access.redhat.com/errata/RHSA-2026:20763
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      https://access.redhat.com/errata/RHSA-2026:20767
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      https://access.redhat.com/errata/RHSA-2026:20782
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      https://access.redhat.com/security/cve/CVE-2026-7374
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      https://bugzilla.redhat.com/show_bug.cgi?id=2463728
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      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7374.json
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      —

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

    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)changed
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    3. Record modifiedRed Hat ADP

      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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

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

    4. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    5. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    6. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    7. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    8. Record modifiedRed Hat ADP

      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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

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

    9. Record modifiedRed Hat ADP

      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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

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

    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)changed
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      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)changed
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    12. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    13. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    14. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

    15. Record modifiedRed Hat ADP

      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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

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

    16. 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 Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)
      Red Hat Container Native Virtualization 4.12, Red Hat Container Native Virtualization 4.13, Red Hat Container Native Virtualization 4.14 (+7)

      Source identifier: secalert@redhat.com

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