Not ratedCVE-2026-100082

    Linux Kernel: security vulnerability (CVE-2026-100082)

    Published Last modified Sources: CVE.org

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    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: xen-blkback: Avoid UAF when reading I/O statistics Reading I/O statistics via sysfs concurrently with tearing down a frontend device might result in UAF or a NULL dereference, as the reading of the statistics data is not synchronized with freeing the data. Use a rwlock for synchronizing.

    Update Linux Kernel to version 5.10.274, Linux Kernel to version 5.15.225, Linux Kernel to version 6.1.192.

    Affected
    • Linux Kernel lt *..5.10.274
    • Linux Kernel lt 5.11..5.15.225
    • Linux Kernel lt 5.16..6.1.192
    • Linux Kernel lt 6.2..6.6.162
    • Linux Kernel lt 6.7..6.12.116
    • Linux Kernel lt 6.13..6.18.62
    • Linux Kernel lt 6.19..7.3.3
    Fixed in
    • Linux Kernel 5.10.274
    • Linux Kernel 5.15.225
    • Linux Kernel 6.1.192
    • Linux Kernel 6.6.162
    • Linux Kernel 6.12.116
    • Linux Kernel 6.18.62
    • Linux Kernel 7.3.3

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

    Metrics

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    Priority

    No value is available for this vulnerability.

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    CVSS v3

    No value is available for this vulnerability.

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    EPSS score

    No value is available for this vulnerability.

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    Severity
    Not rated
    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
    30.00 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
    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
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    Published

    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
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    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: xen-blkback: Avoid UAF when reading I/O statistics Reading I/O statistics via sysfs concurrently with tearing down a frontend device might result in UAF or a NULL dereference, as the reading of the statistics data is not synchronized with freeing the data. Use a rwlock for synchronizing. This is XSA-528 / CVE-2026-100082

    Source: cvelistv5, NVD (NIST)

    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
    • 6.19 – < 7.3.3
    • 5.16 – < 6.1.192
    • 6.2 – < 6.6.162
    • 6.7 – < 6.12.116
    • 6.13 – < 6.18.62
    • < 5.10.274
    • 5.11 – < 5.15.225
    • 7.3.3
    • 6.1.192
    • 6.6.162
    • 6.12.116
    • 6.18.62
    • 5.10.274
    • 5.15.225

    Vendors and products

    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. ReceivedLinux

      Description added or changed

      Show 9 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      In the Linux kernel, the following vulnerability has been resolved: xen-blkback: Avoid UAF when reading I/O statistics Reading I/O statistics via sysfs concurrently with tearing down a frontend device might result in UAF or a NULL dereference, as the reading of the statistics data is not synchronized with freeing the data. Use a rwlock for synchronizing. This is XSA-528 / CVE-2026-100082
      Affected versions (publisher)added
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      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/100xxx/CVE-2026-100082.json">CVE-2026-100082</a>
      Referenceadded
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      https://git.kernel.org/stable/c/253cff0526781e28b1b0f9fdacd74ecdc23d3ab7
      Referenceadded
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      https://git.kernel.org/stable/c/2c9ccbe0ffcff3615c7ad917c49b67571a41f21c
      Referenceadded
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      https://git.kernel.org/stable/c/58ba056991dbcec8a75e6861cb4479ac947b69e6
      Referenceadded
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      https://git.kernel.org/stable/c/b0378161c28e77e4d0e2eda3c9433ab4394d2a2f
      Referenceadded
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      https://git.kernel.org/stable/c/b764e17313534794aeb99c901869f213e36a16ef
      Referenceadded
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      https://git.kernel.org/stable/c/c49934da934cf495faf782aa5d84f413221c9be6
      Referenceadded
      —
      https://git.kernel.org/stable/c/fe9ead8c5bdb752e329cecfecbdb5dfca5e9996b

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

    2. Record modifiedCVE Program

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
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      http://www.openwall.com/lists/oss-security/2026/11/06/11
      Referenceadded
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      http://xenbits.xen.org/xsa/advisory-528.html

      Source identifier: af854a3a-2127-422b-91ae-364da2661108

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