MediumCVE-2024-43879

    Linux Kernel: security vulnerability (CVE-2024-43879)

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

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    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: handle 2x996 RU allocation in cfg80211_calculate_bitrate_he() Currently NL80211_RATE_INFO_HE_RU_ALLOC_2x996 is not handled in cfg80211_calculate_bitrate_he(), leading to below warning: kernel: invalid HE MCS: bw:6, ru:6 kernel: WARNING: CPU: 0 PID: 2312 at net/wireless/util.c:1501 cfg80211_calculate_bitrate_he+0x22b/0x270 [cfg80211] Fix it by handling 2x996 RU allocation in the same way as 160 MHz bandwidth.

    Update Linux Kernel to version 4.19.320, Linux Kernel to version 5.4.282, Linux Kernel to version 5.10.224.

    Affected
    • Linux Kernel lt 4.19..4.19.320
    • Linux Kernel lt 4.20..5.4.282
    • Linux Kernel lt 5.5..5.10.224
    • Linux Kernel lt 5.11..5.15.165
    • Linux Kernel lt 5.16..6.1.103
    • Linux Kernel lt 6.2..6.6.44
    • Linux Kernel lt 6.7..6.10.3
    Fixed in
    • Linux Kernel 4.19.320
    • Linux Kernel 5.4.282
    • Linux Kernel 5.10.224
    • Linux Kernel 5.15.165
    • Linux Kernel 6.1.103
    • Linux Kernel 6.6.44
    • Linux Kernel 6.10.3
    • Linux Kernel 6.11

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

    Metrics

    5.5

    XIEM Effective CVSS

    Highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    0.0

    CVSS v3

    Severity Not rated on the scale from 0 to 10.

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

    0.2 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 12.7

    Show all metrics
    Severity
    Medium
    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
    7.18 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
    5.5 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
    0.0
    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
    0.2 %
    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
    12.7
    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
    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: wifi: cfg80211: handle 2x996 RU allocation in cfg80211_calculate_bitrate_he() Currently NL80211_RATE_INFO_HE_RU_ALLOC_2x996 is not handled in cfg80211_calculate_bitrate_he(), leading to below warning: kernel: invalid HE MCS: bw:6, ru:6 kernel: WARNING: CPU: 0 PID: 2312 at net/wireless/util.c:1501 cfg80211_calculate_bitrate_he+0x22b/0x270 [cfg80211] Fix it by handling 2x996 RU allocation in the same way as 160 MHz bandwidth.

    Source: siemens_advisory, Debian LTS Advisories, suse_csaf, redhat_csaf, BSI CSAF, BSI WID Portal, ENISA EUVD, 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
    • 6.7 – < 6.10.3
    • —
    • 5.11 – < 5.15.165
    • 4.19 – < 4.19.320
    • 6.2 – < 6.6.44
    • 4.20 – < 5.4.282
    • 5.16 – < 6.1.103
    • 5.5 – < 5.10.224
    • 6.10.3
    • 6.11
    • 5.15.165
    • 4.19.320
    • 6.6.44
    • 5.4.282
    • 6.1.103
    • 5.10.224

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianlinux-6.1bullseye
    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 24 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/16ad67e73309db0c20cc2a651992bd01c05e6b27
      Referenceadded
      —
      https://git.kernel.org/stable/c/19eaf4f2f5a981f55a265242ada2bf92b0c742dd
      Referenceadded
      —
      https://git.kernel.org/stable/c/2e201b3d162c6c49417c438ffb30b58c9f85769f
      Referenceadded
      —
      https://git.kernel.org/stable/c/45d20a1c54be4f3173862c7b950d4468447814c9
      Referenceadded
      —
      https://git.kernel.org/stable/c/576c64622649f3ec07e97bac8fec8b8a2ef4d086
      Referenceadded
      —
      https://git.kernel.org/stable/c/67b5f1054197e4f5553047759c15c1d67d4c8142
      Referenceadded
      —
      https://git.kernel.org/stable/c/b289ebb0516526cb4abae081b7ec29fd4fa1209d
      Referenceadded
      —
      https://git.kernel.org/stable/c/bcbd771cd5d68c0c52567556097d75f9fc4e7cd6
      Referenceremoved
      https://git.kernel.org/stable/c/16ad67e73309db0c20cc2a651992bd01c05e6b27
      —
      Referenceremoved
      https://git.kernel.org/stable/c/19eaf4f2f5a981f55a265242ada2bf92b0c742dd
      —
      Referenceremoved
      https://git.kernel.org/stable/c/2e201b3d162c6c49417c438ffb30b58c9f85769f
      —
      Referenceremoved
      https://git.kernel.org/stable/c/45d20a1c54be4f3173862c7b950d4468447814c9
      —
      Referenceremoved
      https://git.kernel.org/stable/c/576c64622649f3ec07e97bac8fec8b8a2ef4d086
      —
      Referenceremoved
      https://git.kernel.org/stable/c/67b5f1054197e4f5553047759c15c1d67d4c8142
      —
      Referenceremoved
      https://git.kernel.org/stable/c/b289ebb0516526cb4abae081b7ec29fd4fa1209d
      —
      Referenceremoved
      https://git.kernel.org/stable/c/bcbd771cd5d68c0c52567556097d75f9fc4e7cd6
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/16ad67e73309db0c20cc2a651992bd01c05e6b27 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/19eaf4f2f5a981f55a265242ada2bf92b0c742dd Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/2e201b3d162c6c49417c438ffb30b58c9f85769f Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/45d20a1c54be4f3173862c7b950d4468447814c9 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/576c64622649f3ec07e97bac8fec8b8a2ef4d086 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/67b5f1054197e4f5553047759c15c1d67d4c8142 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/b289ebb0516526cb4abae081b7ec29fd4fa1209d Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/bcbd771cd5d68c0c52567556097d75f9fc4e7cd6 Types: Patch
      —

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

    2. Record modifiedCVE Program

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
      Referenceadded
      —
      https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
      Referenceremoved
      https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
      —
      Referenceremoved
      https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
      —

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

    3. Record modifiedSiemens ADP

      Show 5 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/2024/43xxx/CVE-2024-43879.json">CVE-2024-43879</a>
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-355557.html
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      —
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-355557.html
      —

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

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