SB20261015110 - Improper input validation in Linux kernel mac80211
Published: October 15, 2026
Security Bulletin ID
SB20261015110
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2026-98421)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a kernel warning.
The vulnerability exists due to improper validation of the peer station state in the mac80211 TDLS management component when preparing a TDLS setup confirmation frame. A local user can request a TDLS setup confirmation for a peer without an existing TDLS station to trigger a kernel warning.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/038e1d126304fd25d507fd4e671232df57bd1799
- https://git.kernel.org/stable/c/1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4b
- https://git.kernel.org/stable/c/6bae6ef511a29ef12ab969adeea691067d4d5d74
- https://git.kernel.org/stable/c/742c762bee59c973684f70dfed7de4945d3141e2
- https://git.kernel.org/stable/c/d0afa5395c46d73ad2090aa50209886e84f179bd
- https://git.kernel.org/stable/c/fce36d242a18ddf64731d816a37564103172da11