Use-after-free in Linux kernel - CVE-2026-46213
Published: May 29, 2026
Vulnerability identifier: #VU132989
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-46213
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the appletb-kbd inactivity timer cleanup path when handling driver tear-down and timer re-arming through HID event callbacks. A local user can trigger driver removal or error-handling conditions to cause a denial of service.
The issue can be reached through two race windows during cleanup, including concurrent backlight device unbind activity and late HID event callbacks that re-arm the timer.
How to mitigate CVE-2026-46213
Install security update from vendor's repository.