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Back to active CVEs
High · CVSS 8.3CVE-2025-22038

ksmbd: validate zero num_subauth before sub_auth is accessedCVE-2025-22038

Answer in brief

CVE-2025-22038 records a High severity (CVSS 8.3) vulnerability in ksmbd: validate zero num_subauth before sub_auth is accessed. 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 Apr 16, 2025Updated Aug 5, 2026Source checked Nov 3, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 2026
Upstream Advisory

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Nov 3, 2026
References
7 linked sources
Open source record

Key facts

Risk
High · CVSS 8.3
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.3. 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>=0626e6641f6b467447c81dd7678a69c66f7746cf <3ac65de111c686c95316ade660f8ba7aea3cd3cc || >=0626e6641f6b467447c81dd7678a69c66f7746cf <0e36a3e080d6d8bd7a34e089345d043da4ac8283 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <56de7778a48560278c334077ace7b9ac4bfb2fd1 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <68c6c3142bfcdb049839d40a9a59ebe8ea865002 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <bf21e29d78cd2c2371023953d9c82dfef82ebb363ac65de111c686c95316ade660f8ba7aea3cd3cc, 0e36a3e080d6d8bd7a34e089345d043da4ac8283, 56de7778a48560278c334077ace7b9ac4bfb2fd1, 68c6c3142bfcdb049839d40a9a59ebe8ea865002, c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20, bf21e29d78cd2c2371023953d9c82dfef82ebb36
Linux/Linuxgeneric5.15Not 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 3ac65de111c686c95316ade660f8ba7aea3cd3cc if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Apr 16, 2025

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

  2. Source modified

    Aug 5, 2026

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

  3. First seen by HOL

    Aug 5, 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
  • Source referencegit.kernel.org
  • Source referencelists.debian.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate zero num_subauth before sub_auth is accessed Access psid->sub_auth[psid->num_subauth - 1] without checking if num_subauth is non-zero leads to an out-of-bounds read. This patch adds a validation step to ensure num_subauth != 0 before sub_auth is accessed.

Quoted source text, attributed separately from HOL analysis.