SB20261022439 - Double free in Linux kernel wireless

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Main Vulnerability Database SB20261022439

SB20261022439 - Double free in Linux kernel wireless

Published: October 22, 2026

Security Bulletin ID SB20261022439
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Double free (CVE-ID: CVE-2026-98823)

CWE-ID: CWE-415 - Double Free

CVSSv4: 6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker on the local network to potentially cause a denial of service through kernel memory corruption.

The vulnerability exists due to a double free in the Linux kernel cfg80211 scan-entry handling when merging a hidden-group probe-response entry into an associated entry after a channel switch. A remote attacker on the local network can trigger the affected processing to give two entries ownership of the same beacon information-element allocation, causing it to be freed twice when the entries are released and potentially resulting in a kernel crash.


Remediation

Install update from vendor's website.

References