Integer underflow in Linux kernel - CVE-2026-89524
Published: September 12, 2026
Vulnerability identifier: #VU149275
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89524
CWE-ID: CWE-191
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an integer underflow in ath6kl_cfg80211_connect_event() when handling association events with request or response lengths shorter than their fixed information element offsets. A remote attacker can trigger such an association event to disclose sensitive information.
Affected software
Linux kernel
How to mitigate CVE-2026-89524
Install security update from vendor's repository.