SB2026091858 - Race condition in Linux kernel wireless virtual driver
Published: September 18, 2026
Security Bulletin ID
SB2026091858
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) Race condition (CVE-ID: CVE-2026-93149)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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 a race condition in the mac80211_hwsim_stop() pending-frame queue drain when stopping the mac80211_hwsim device. A local user can trigger concurrent TX status handling that removes the final pending frame to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/158438cd6ad69d6dd7d871582c38baf22169fede
- https://git.kernel.org/stable/c/1c2a4ab6efa26415dd131b8c222e7893fda03435
- https://git.kernel.org/stable/c/2817431a61557f46dc63077b7cc126bc906c242e
- https://git.kernel.org/stable/c/c40ba47f2ba1951cb32ea048667ed014d36a5749
- https://git.kernel.org/stable/c/d131027054a8dd922dda01fe8d381abe5af4970b
- https://git.kernel.org/stable/c/e7fccad2c8e6ef6bbafe509c95869d161d0f466b