Improper input validation in Linux kernel - CVE-2026-90344
Published: September 18, 2026
Vulnerability identifier: #VU151132
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90344
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in the mac80211 channel switch announcement parser when processing a channel switch announcement that advertises channel zero. A remote attacker can advertise a channel switch to channel zero to cause a denial of service.
The firmware-crash condition applies to Intel devices.
Affected software
Linux kernel
How to mitigate CVE-2026-90344
Install security update from vendor's repository.