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VulnerabilityPublished

CVE-2026-99279: Linux kernel · ksmbd: reclaim ended sessions on logoff and expiration

Source GCVE Database

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Authoritative record:CVE-2026-99279· Medium

Not known to be exploited · fixed in 26534ef335e92b028eb58e44d98d46a0e26af0ec : update Linux kernel when convenient.

Data as of 7 Nov 2026, 16:05 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 26534ef335e92b028eb58e44d98d46a0e26af0ec, 1767a5e45dbf6a3b12105196dda4fb0ef80b9698, 7.3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade Linux kernel to 26534ef335e92b028eb58e44d98d46a0e26af0ec, 1767a5e45dbf6a3b12105196dda4fb0ef80b9698 or 7.3.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=7.2.8 <7.3
Fixed in
  • 26534ef335e92b028eb58e44d98d46a0e26af0ec
  • 1767a5e45dbf6a3b12105196dda4fb0ef80b9698
  • 7.3
LinuxLinuxAffected
  • =7.3
Fixed in–

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel ksmbd subsystem. Users should apply the official kernel updates that include this patch to ensure proper session cleanup and resource reclamation. Since this is a kernel-level fix, upgrading to a kernel version containing this patch is the recommended mitigation. No additional vendor advisory or patch links were provided; users should monitor official Linux kernel release notes for the relevant fix.

Description

CVE-2026-99279 addresses a vulnerability in the Linux kernel's ksmbd component related to session management. The flaw involved ended SMB sessions retaining memory and connection slots after logoff or expiration, potentially leading to resource retention issues. The fix ensures that ended sessions are properly reclaimed and removed from global tables and procfs entries, preventing stale session data from persisting. This includes unlinking sessions from connections and disposing of them safely outside locks to avoid concurrency issues.

References

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