Use-after-free in Linux kernel - CVE-2026-63832
Published: July 20, 2026
Vulnerability identifier: #VU138823
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-63832
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to memory corruption in the mt76_sta_add function when handling station addition for published wcid entries. A local user can trigger repeated station add operations to cause a denial of service.
The issue was observed as dev->sta_poll_list corruption on systems using the mt7925 driver.
Affected software
Linux kernel
How to mitigate CVE-2026-63832
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3