SB2026052990 - Use-after-free in Linux kernel hid driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-46213)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4db2af929279c799b5653a39eb0795c72baffca4
• https://git.kernel.org/stable/c/59a79938ca5541fe55d675304116b7ea684afef0
• https://git.kernel.org/stable/c/93d989e47bc316c793a69c6a332e053c90e29f02