HighCVE-2024-26982

    Linux Kernel: Out-of-Bounds Access (CVE-2024-26982)

    Published Last modified Sources: Siemens ProductCERT, SUSE, Debian LTS, Debian, BSI, CVE.org, EUVD

    What is affected, what to do

    Update Linux Kernel to version 5.4.291, Linux Kernel to version 5.10.235, Linux Kernel to version 5.15.179.

    Affected
    • Linux Kernel lt 2.6.29..5.4.291
    • Linux Kernel lt 5.5..5.10.235
    • Linux Kernel lt 5.11..5.15.179
    • Linux Kernel lt 5.16..6.1.130
    • Linux Kernel lt 6.2..6.6.30
    • Linux Kernel lt 6.7..6.8.8
    Fixed in
    • Linux Kernel 5.4.291
    • Linux Kernel 5.10.235
    • Linux Kernel 5.15.179
    • Linux Kernel 6.1.130
    • Linux Kernel 6.6.30
    • Linux Kernel 6.8.8
    • Linux Kernel 6.9

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

    Metrics

    7.1

    Priority

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

    Source: NVD, CVSS v3

    7.1

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: Siemens ProductCERT, SUSE, Debian LTS, Debian, BSI, CVE.org, EUVD

    0.3 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 20.8

    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
    44.01 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
    7.1 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
    7.1
    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
    20.8
    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: partial
    Source: CISA Vulnrichment, as of 10 September 2024

    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:

    Squashfs: check the inode number is not the invalid value of zero

    Syskiller has produced an out of bounds access in fill_meta_index().

    That out of bounds access is ultimately caused because the inode has an inode number with the invalid value of zero, which was not checked.

    The reason this causes the out of bounds access is due to following sequence of events:

    1. Fill_meta_index() is called to allocate (via empty_meta_index()) and fill a metadata index. It however suffers a data read error and aborts, invalidating the newly returned empty metadata index. It does this by setting the inode number of the index to zero, which means unused (zero is not a valid inode number).

    2. When fill_meta_index() is subsequently called again on another read operation, locate_meta_index() returns the previous index because it matches the inode number of 0. Because this index has been returned it is expected to have been filled, and because it hasn't been, an out of bounds access is performed.

    This patch adds a sanity check which checks that the inode number is not zero when the inode is created and returns -EINVAL if it is.

    [phillip@squashfs.org.uk: whitespace fix]

    Source: siemens_advisory, suse_csaf, Debian LTS Advisories, Debian Security Advisories, BSI WID Portal, BSI CSAF, cvelistv5, NVD (NIST), 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
    LinuxLinux
    • 5.5 – < 5.10.235
    • 5.16 – < 6.1.130
    • 2.6.29 – < 5.4.291
    • —
    • 5.11 – < 5.15.179
    • 6.7 – < 6.8.8
    • 6.2 – < 6.6.30
    • 5.10.235
    • 6.1.130
    • 5.4.291
    • 6.9
    • 5.15.179
    • 6.8.8
    • 6.6.30
    SiemensSIMATIC S7
    • 1500 TM MFP V1.1.1 GNU/Linux subsystem
    • —

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianlinuxbookworm
    Linuxdebianlinuxbullseye
    Linuxdebianlinux-6.1bullseye
    Linuxlinuxlinux_kernel6.9
    Linuxlinuxlinux_kernel—

    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 modifiedLinux

      Show 17 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/32c114a58236fe67141634774559f21f1dc96fd7
      Referenceadded
      —
      https://git.kernel.org/stable/c/4a1b6f89825e267e156ccaeba3d235edcac77f94
      Referenceadded
      —
      https://git.kernel.org/stable/c/5b99dea79650b50909c50aba24fbae00f203f013
      Referenceadded
      —
      https://git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5
      Referenceadded
      —
      https://git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395
      Referenceadded
      —
      https://git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772e
      Referenceadded
      —
      https://git.kernel.org/stable/c/cf46f88b92cfc0e32bd8a21ba1273cff13b8745f
      Referenceremoved
      https://git.kernel.org/stable/c/32c114a58236fe67141634774559f21f1dc96fd7
      —
      Referenceremoved
      https://git.kernel.org/stable/c/4a1b6f89825e267e156ccaeba3d235edcac77f94
      —
      Referenceremoved
      https://git.kernel.org/stable/c/5b99dea79650b50909c50aba24fbae00f203f013
      —
      Referenceremoved
      https://git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5
      —
      Referenceremoved
      https://git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395
      —
      Referenceremoved
      https://git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772e
      —
      Referenceremoved
      https://git.kernel.org/stable/c/cf46f88b92cfc0e32bd8a21ba1273cff13b8745f
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5 Types: Mailing List, Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395 Types: Mailing List, Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772e Types: Mailing List, Patch
      —

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

    2. Record modifiedCVE Program

      Show 19 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5
      Referenceadded
      —
      https://git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395
      Referenceadded
      —
      https://git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772e
      Referenceadded
      —
      https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
      Referenceadded
      —
      https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
      Referenceadded
      —
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/
      Referenceadded
      —
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/
      Referenceadded
      —
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/
      Referenceremoved
      https://git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5
      —
      Referenceremoved
      https://git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395
      —
      Referenceremoved
      https://git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772e
      —
      Referenceremoved
      https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
      —
      Referenceremoved
      https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
      —
      Referenceremoved
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/
      —
      Referenceremoved
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/
      —
      Referenceremoved
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5 Types: Mailing List, Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395 Types: Mailing List, Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772e Types: Mailing List, Patch
      —

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

    3. Record modifiedSiemens ADP

      Show 6 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/2024/26xxx/CVE-2024-26982.json">CVE-2024-26982</a>
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-503939.html
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-784472.html
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      —
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-503939.html
      —

      Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

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