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Back to active CVEs
Critical · CVSS 9.8CVE-2024-50086

ksmbd: fix user-after-free from session log offCVE-2024-50086

Answer in brief

CVE-2024-50086 records a Critical severity (CVSS 9.8) vulnerability in ksmbd: fix user-after-free from session log off. 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 Oct 29, 2024Updated Aug 5, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. 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/Linuxgeneric5.15Not reported
Linux/Linuxgeneric>=0626e6641f6b467447c81dd7678a69c66f7746cf <0f62358ce85b2d4c949ef1b648be01b29cec667a || >=0626e6641f6b467447c81dd7678a69c66f7746cf <a9839c37fd813b432988f58a9d9dd59253d3eb2c || >=0626e6641f6b467447c81dd7678a69c66f7746cf <5511999e9615e4318e9142d23b29bd1597befc08 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <ee371898b53a9b9b51c02d22a8c31bfb86d45f0d || >=0626e6641f6b467447c81dd7678a69c66f7746cf <7aa8804c0b67b3cb263a472d17f2cb50d7f1a9300f62358ce85b2d4c949ef1b648be01b29cec667a, a9839c37fd813b432988f58a9d9dd59253d3eb2c, 5511999e9615e4318e9142d23b29bd1597befc08, ee371898b53a9b9b51c02d22a8c31bfb86d45f0d, 7aa8804c0b67b3cb263a472d17f2cb50d7f1a930

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 0f62358ce85b2d4c949ef1b648be01b29cec667a if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 29, 2024

    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 referencelists.debian.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix user-after-free from session log off There is racy issue between smb2 session log off and smb2 session setup. It will cause user-after-free from session log off. This add session_lock when setting SMB2_SESSION_EXPIRED and referece count to session struct not to free session while it is being used.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 4, 2026
References
6 linked sources
Open source record