SB20260812114 - Deadlock in Linux kernel wireless
Published: August 12, 2026
Security Bulletin ID
SB20260812114
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Deadlock (CVE-ID: CVE-2026-68408)
CWE-ID: CWE-833 - Deadlock
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 cause a denial of service.
The vulnerability exists due to a deadlock in cfg80211 PMSR work handling when closing a netlink socket that owns a PMSR session concurrently with interface teardown. A local user can close the socket and trigger concurrent interface shutdown processing to cause a denial of service.
The deadlock is also reachable from cfg80211_leave_locked() when interface cleanup is performed under wiphy_lock.
Remediation
Install update from vendor's website.