Improper input validation in Linux kernel - CVE-2026-98421
Published: October 15, 2026
Vulnerability identifier: #VU155893
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-98421
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98421
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External 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