Use-after-free in Linux kernel - CVE-2026-89624
Published: September 12, 2026
Vulnerability identifier: #VU149186
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89624
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to write to freed memory.
The vulnerability exists due to improper resource shutdown in universal_pidff_probe() when opening a surviving /dev/hidrawX device after force-feedback initialization fails. A local user can open the surviving device to write to freed memory.
A descriptor with a PID usage page and no input reports can cause force-feedback initialization to fail after the device starts.
Affected software
Linux kernel
How to mitigate CVE-2026-89624
Install security update from vendor's repository.