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  4. CVE 2026 80954 i3c fix unlocked dereference of dev desc in
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Back to active CVEs
High · CVSS 7.8CVE-2026-80954

i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()CVE-2026-80954

Answer in brief

CVE-2026-80954 records a High severity (CVSS 7.8) vulnerability in i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Oct 19, 2026Source checked Oct 27, 2026First seen by HOL Sep 11, 2026Material review Oct 19, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=256a21743d911f94ce92fe28f793cd586f3860b2 <251db58324ea4792c3f9f692ab09be148e051969 || >=256a21743d911f94ce92fe28f793cd586f3860b2 <8bed7f4fa710914b7f05fd59998316bfb4d43385251db58324ea4792c3f9f692ab09be148e051969, 8bed7f4fa710914b7f05fd59998316bfb4d43385
Linux/Linuxgeneric6.19Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 251db58324ea4792c3f9f692ab09be148e051969 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 11, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode() i3c_device_get_supported_xfer_mode() uses dev->desc to obtain the master controller. However, dev->desc must not be dereferenced unless bus->lock is held, and this function does not take that lock. The function only needs access to the master controller associated with the device's bus. Use dev->bus instead, which is always valid for the lifetime of the device and does not require dereferencing dev->desc.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 27, 2026
References
2 linked sources
Open source record