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Back to active CVEs
High · CVSS 8.8CVE-2026-23226

ksmbd: add chann_lock to protect ksmbd_chann_list xarrayCVE-2026-23226

Answer in brief

CVE-2026-23226 records a High severity (CVSS 8.8) vulnerability in ksmbd: add chann_lock to protect ksmbd_chann_list xarray. 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 Feb 18, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. 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>=1d9c4172110e645b383ff13eee759728d74f1a5d <43ad494ac6e940a8eabf25d5bd77bb3bb53b1153 || >=1d9c4172110e645b383ff13eee759728d74f1a5d <4c2ca31608521895dd742a43beca4b4d29762345 || >=1d9c4172110e645b383ff13eee759728d74f1a5d <e4a8a96a93d08570e0405cfd989a8a07e5b6ff33 || >=1d9c4172110e645b383ff13eee759728d74f1a5d <36ef605c0395b94b826a8c8d6f2697071173de6e || >=1d9c4172110e645b383ff13eee759728d74f1a5d <4f3a06cc57976cafa8c6f716646be6c79a99e485 || b1caecbf34b8c8260d851ec4efde71f3694460b7 || 91bbf9cb2387a0d76322e9a343bc6bc160f66b3f || 853c416710b075153c1e1421e099ffbe5dac68ce || >=5.15.145 <5.16 || >=6.1.29 <6.2 || >=6.2.16 <6.343ad494ac6e940a8eabf25d5bd77bb3bb53b1153, 4c2ca31608521895dd742a43beca4b4d29762345, e4a8a96a93d08570e0405cfd989a8a07e5b6ff33, 36ef605c0395b94b826a8c8d6f2697071173de6e, 4f3a06cc57976cafa8c6f716646be6c79a99e485, 5.16, 6.2, 6.3
Linux/Linuxgeneric6.3Not 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 43ad494ac6e940a8eabf25d5bd77bb3bb53b1153 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Feb 18, 2026

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

  2. Source modified

    Oct 21, 2026

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

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

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

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

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 21, 2026
References
5 linked sources
Open source record