SB20261022313 - Use-after-free in Linux kernel mac80211

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Main Vulnerability Database SB20261022313

SB20261022313 - Use-after-free in Linux kernel mac80211

Published: October 22, 2026

Security Bulletin ID SB20261022313
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) Use-after-free (CVE-ID: CVE-2026-98708)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to potentially cause a denial of service by triggering a kernel use-after-free.

The vulnerability exists due to use-after-free in the Linux kernel mac80211 channel-context management code when releasing or reassigning the last assigned link during an in-place channel-context replacement. A local user can trigger these operations while a replacement pairing remains active to leave a stale replace_ctx pointer that subsequent unreserve or switch-finalization operations may dereference, potentially crashing the kernel.


Remediation

Install update from vendor's website.

References