HighCVE-2024-26898

    Linux Kernel: Use After Free (CVE-2024-26898)

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

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    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts This patch is against CVE-2023-6270. The description of cve is: A flaw was found in the ATA over Ethernet (AoE) driver in the Linux kernel.

    Update Linux Kernel to version 4.19.311, Linux Kernel to version 5.4.273, Linux Kernel to version 5.10.214.

    Affected
    • Linux Kernel lt 2.6.22..4.19.311
    • Linux Kernel lt 4.20..5.4.273
    • Linux Kernel lt 5.5..5.10.214
    • Linux Kernel lt 5.11..5.15.153
    • Linux Kernel lt 5.16..6.1.83
    • Linux Kernel lt 6.2..6.6.23
    • Linux Kernel lt 6.7..6.7.11
    • Linux Kernel lt 6.8..6.8.2
    Fixed in
    • Linux Kernel 4.19.311
    • Linux Kernel 5.4.273
    • Linux Kernel 5.10.214
    • Linux Kernel 5.15.153
    • Linux Kernel 6.1.83
    • Linux Kernel 6.6.23
    • Linux Kernel 6.7.11
    • Linux Kernel 6.8.2
    • Linux Kernel 6.9

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

    Metrics

    7.8

    XIEM Effective CVSS

    Highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    7.8

    CVSS v3

    Severity High on the scale from 0 to 10.

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

    0.3 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 23.9

    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
    48.43 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
    7.8 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
    7.8
    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
    0.3 %
    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
    23.9
    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: total
    Source: CISA Vulnrichment, as of 12 June 2024
    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-416

    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: aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts This patch is against CVE-2023-6270. The description of cve is: A flaw was found in the ATA over Ethernet (AoE) driver in the Linux kernel. The aoecmd_cfg_pkts() function improperly updates the refcnt on `struct net_device`, and a use-after-free can be triggered by racing between the free on the struct and the access through the `skbtxq` global queue. This could lead to a denial of service condition or potential code execution. In aoecmd_cfg_pkts(), it always calls dev_put(ifp) when skb initial code is finished. But the net_device ifp will still be used in later tx()->dev_queue_xmit() in kthread. Which means that the dev_put(ifp) should NOT be called in the success path of skb initial code in aoecmd_cfg_pkts(). Otherwise tx() may run into use-after-free because the net_device is freed. This patch removed the dev_put(ifp) in the success path in aoecmd_cfg_pkts(), and added dev_put() after skb xmit in tx().

    Source: siemens_advisory, suse_csaf, Debian Security Advisories, BSI CSAF, BSI WID Portal, cvelistv5, ENISA EUVD, 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
    • 6.8 – < 6.8.2
    • 5.11 – < 5.15.153
    • 5.16 – < 6.1.83
    • —
    • 5.5 – < 5.10.214
    • 6.2 – < 6.6.23
    • 6.7 – < 6.7.11
    • 2.6.22 – < 4.19.311
    • 4.20 – < 5.4.273
    • 6.8.2
    • 5.15.153
    • 6.1.83
    • 6.9
    • 5.10.214
    • 6.6.23
    • 6.7.11
    • 4.19.311
    • 5.4.273

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianlinuxbullseye
    Linuxlinuxlinux_kernel—

    Weakness classes (CWE)

    • CWE-416Use After Free

      Variant

      The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

      Entry at MITRE CWE-416

    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 27 original changes
      Individual changes of this event as published by NVD
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      https://git.kernel.org/stable/c/079cba4f4e307c69878226fdf5228c20aa1c969c
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      https://git.kernel.org/stable/c/1a54aa506b3b2f31496731039e49778f54eee881
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      https://git.kernel.org/stable/c/74ca3ef68d2f449bc848c0a814cefc487bf755fa
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      https://git.kernel.org/stable/c/7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4
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      https://git.kernel.org/stable/c/a16fbb80064634b254520a46395e36b87ca4731e
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      https://git.kernel.org/stable/c/ad80c34944d7175fa1f5c7a55066020002921a99
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      https://git.kernel.org/stable/c/eb48680b0255a9e8a9bdc93d6a55b11c31262e62
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      https://git.kernel.org/stable/c/f98364e926626c678fb4b9004b75cacf92ff0662
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      https://git.kernel.org/stable/c/faf0b4c5e00bb680e8e43ac936df24d3f48c8e65
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      https://git.kernel.org/stable/c/079cba4f4e307c69878226fdf5228c20aa1c969c
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      https://git.kernel.org/stable/c/1a54aa506b3b2f31496731039e49778f54eee881
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      https://git.kernel.org/stable/c/74ca3ef68d2f449bc848c0a814cefc487bf755fa
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      https://git.kernel.org/stable/c/079cba4f4e307c69878226fdf5228c20aa1c969c Types: Patch
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      https://git.kernel.org/stable/c/1a54aa506b3b2f31496731039e49778f54eee881 Types: Patch
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      https://git.kernel.org/stable/c/74ca3ef68d2f449bc848c0a814cefc487bf755fa Types: Patch
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      https://git.kernel.org/stable/c/7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4 Types: Patch
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      https://git.kernel.org/stable/c/a16fbb80064634b254520a46395e36b87ca4731e Types: Patch
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      https://git.kernel.org/stable/c/ad80c34944d7175fa1f5c7a55066020002921a99 Types: Patch
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      https://git.kernel.org/stable/c/eb48680b0255a9e8a9bdc93d6a55b11c31262e62 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/f98364e926626c678fb4b9004b75cacf92ff0662 Types: Patch
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      Reference typeremoved
      https://git.kernel.org/stable/c/faf0b4c5e00bb680e8e43ac936df24d3f48c8e65 Types: Patch
      —

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

    2. Record modifiedCVE Program

      Show 31 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
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      https://git.kernel.org/stable/c/079cba4f4e307c69878226fdf5228c20aa1c969c
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      https://git.kernel.org/stable/c/1a54aa506b3b2f31496731039e49778f54eee881
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      https://git.kernel.org/stable/c/74ca3ef68d2f449bc848c0a814cefc487bf755fa
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      https://git.kernel.org/stable/c/7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4
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      https://git.kernel.org/stable/c/a16fbb80064634b254520a46395e36b87ca4731e
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      https://git.kernel.org/stable/c/ad80c34944d7175fa1f5c7a55066020002921a99
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      https://git.kernel.org/stable/c/eb48680b0255a9e8a9bdc93d6a55b11c31262e62
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      https://git.kernel.org/stable/c/f98364e926626c678fb4b9004b75cacf92ff0662
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      https://git.kernel.org/stable/c/faf0b4c5e00bb680e8e43ac936df24d3f48c8e65
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      https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
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      https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
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      https://git.kernel.org/stable/c/faf0b4c5e00bb680e8e43ac936df24d3f48c8e65
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      https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
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      https://git.kernel.org/stable/c/079cba4f4e307c69878226fdf5228c20aa1c969c Types: Patch
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      https://git.kernel.org/stable/c/1a54aa506b3b2f31496731039e49778f54eee881 Types: Patch
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      https://git.kernel.org/stable/c/74ca3ef68d2f449bc848c0a814cefc487bf755fa Types: Patch
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      https://git.kernel.org/stable/c/7dd09fa80b0765ce68bfae92f4e2f395ccf0fba4 Types: Patch
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      https://git.kernel.org/stable/c/a16fbb80064634b254520a46395e36b87ca4731e Types: Patch
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      https://git.kernel.org/stable/c/ad80c34944d7175fa1f5c7a55066020002921a99 Types: Patch
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      https://git.kernel.org/stable/c/eb48680b0255a9e8a9bdc93d6a55b11c31262e62 Types: Patch
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      https://git.kernel.org/stable/c/f98364e926626c678fb4b9004b75cacf92ff0662 Types: Patch
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      https://git.kernel.org/stable/c/faf0b4c5e00bb680e8e43ac936df24d3f48c8e65 Types: Patch
      —

      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/2024/26xxx/CVE-2024-26898.json">CVE-2024-26898</a>
      Referenceadded
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      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      Referenceadded
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      https://cert-portal.siemens.com/productcert/html/ssa-398330.html
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-265688.html
      —
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-398330.html
      —

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

    4. Record modifiedLinux

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

      Show the original change
      Individual changes of this event as published by NVD
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      AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

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