MediumCVE-2026-53293

    Linux Kernel: Deadlock (CVE-2026-53293)

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

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    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix AMDGPU_INFO_READ_MMR_REG There were multiple issues in that code. First of all the order between the reset semaphore and the mm_lock was wrong (e.g. copy_to_user) was called while holding the lock.

    The available sources name no fixed version. Check the vendor guidance in the references below.

    Conflicting version data — version display is hidden until the data is resolved.

    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: SUSE, Ubuntu, BSI, EUVD, CVE.org, Msrc Update Guide

    0.1 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 2.2

    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
    18.82 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
    0.1 %
    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
    2.2
    Low — this CVE sits in the lower 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 6 November 2026

    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: drm/amdgpu: fix AMDGPU_INFO_READ_MMR_REG There were multiple issues in that code. First of all the order between the reset semaphore and the mm_lock was wrong (e.g. copy_to_user) was called while holding the lock. Then we allocated memory while holding the reset semaphore which is also a pretty big bug and can deadlock. Then we used down_read_trylock() instead of waiting for the reset to finish. (cherry picked from commit 361b6e6b303d4b691f6c5974d3eaab67ca6dd90e)

    Source: suse_csaf, Ubuntu Security Notices, BSI WID Portal, BSI CSAF, ENISA EUVD, cvelistv5, NVD (NIST), Microsoft Security Update Guide

    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
    • 6.12 – < 6.12.91
    • 6.6.55 – < 6.6.141
    • 6.10.14 – < 6.11
    • —
    • 6.11.3 – < 6.12
    • 6.13 – < 6.18.33
    • 6.19 – < 7.0.10
    • 6.12.91
    • 6.6.141
    • 6.11
    • 7.1
    • 6.12
    • 6.18.33
    • 7.0.10

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxubuntulinux-oracle-7.0noble
    Linuxlinuxlinux_kernel7.1
    Linuxlinuxlinux_kernel—

    References & sources

    • git.kernel.orgstable/c/8c4254c8f5836e77ae83e7fc037f02b69f7a0977Patch, euvd
    • git.kernel.orgstable/c/61957c2e467b39b528a290016367d32a433fa846Patch, euvd
    • git.kernel.orgstable/c/a31c3feb54b15a90232e497ad0e27e8a82052d8dPatch, euvd
    • git.kernel.orgstable/c/5c29d20470d4566d1b68df57097d642d01f8b427Patch, euvd
    • git.kernel.orgstable/c/0ef196a208385b7d7da79f411c161b04e97283e2Patch, euvd

    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 15 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/0ef196a208385b7d7da79f411c161b04e97283e2
      Referenceadded
      —
      https://git.kernel.org/stable/c/5c29d20470d4566d1b68df57097d642d01f8b427
      Referenceadded
      —
      https://git.kernel.org/stable/c/61957c2e467b39b528a290016367d32a433fa846
      Referenceadded
      —
      https://git.kernel.org/stable/c/8c4254c8f5836e77ae83e7fc037f02b69f7a0977
      Referenceadded
      —
      https://git.kernel.org/stable/c/a31c3feb54b15a90232e497ad0e27e8a82052d8d
      Referenceremoved
      https://git.kernel.org/stable/c/0ef196a208385b7d7da79f411c161b04e97283e2
      —
      Referenceremoved
      https://git.kernel.org/stable/c/5c29d20470d4566d1b68df57097d642d01f8b427
      —
      Referenceremoved
      https://git.kernel.org/stable/c/61957c2e467b39b528a290016367d32a433fa846
      —
      Referenceremoved
      https://git.kernel.org/stable/c/8c4254c8f5836e77ae83e7fc037f02b69f7a0977
      —
      Referenceremoved
      https://git.kernel.org/stable/c/a31c3feb54b15a90232e497ad0e27e8a82052d8d
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/0ef196a208385b7d7da79f411c161b04e97283e2 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/5c29d20470d4566d1b68df57097d642d01f8b427 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/61957c2e467b39b528a290016367d32a433fa846 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/8c4254c8f5836e77ae83e7fc037f02b69f7a0977 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/a31c3feb54b15a90232e497ad0e27e8a82052d8d Types: Patch
      —

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

    2. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: no

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-53293","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-11-06T16:25:39.230314Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    3. Initial analysis by NVDNVD

      Newly listed as affected:
      • Linux Kernel (6.10.14 – before 6.11; 6.13 – before 6.18.33; 6.19 – before 7.0.10; 6.11.3 – before 6.12.91; 6.6.55 – before 6.6.141; 1 individual version)

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

      Weakness type: CWE-667

      Show 8 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
      Weakness type (CWE)added
      —
      CWE-667
      Product configurationadded
      —
      OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.10.14 up to (excluding) 6.11 *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.11.3 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.55 up to (excluding) 6.6.141
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/0ef196a208385b7d7da79f411c161b04e97283e2 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/5c29d20470d4566d1b68df57097d642d01f8b427 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/61957c2e467b39b528a290016367d32a433fa846 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/8c4254c8f5836e77ae83e7fc037f02b69f7a0977 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/a31c3feb54b15a90232e497ad0e27e8a82052d8d Types: Patch

      Source identifier: nvd@nist.gov

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