SB2026100739 - Operation on a Resource after Expiration or Release in Linux kernel mac80211

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Main Vulnerability Database SB2026100739

SB2026100739 - Operation on a Resource after Expiration or Release in Linux kernel mac80211

Published: October 7, 2026

Security Bulletin ID SB2026100739
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Operation on a Resource after Expiration or Release (CVE-ID: CVE-2026-98331)

CWE-ID: CWE-672 - Operation on a Resource after Expiration or Release

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to retaining references to unregistered interfaces in the mac80211 interface list when unregistering a network device without going through ieee80211_if_remove(). A local user can trigger destruction of a network namespace containing a wiphy to cause a denial of service.

Exploitation depends on allocation failures preventing the wiphy from being moved to the initial network namespace. Subsequent hardware unregistration can trigger a kernel BUG.


Remediation

Install update from vendor's website.

References