CVE-2026-80572

Summary

In the Linux kernel, the following vulnerability has been resolved:

Input: byd - synchronize timer deletion before freeing private data

byd_disconnect() uses timer_delete() before freeing the driver's private data. This does not wait for a running byd_clear_touch() callback, which dereferences the private data and its psmouse pointer. A callback racing with disconnect can therefore access the private data after it has been freed. The timer can also still be re-armed by byd_process_byte() while the disconnect is in progress.

Use timer_shutdown_sync() before freeing the private data: it waits for a running callback and turns any later re-arm attempt into a no-op.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2d5f5611dd0de52e9a52b56391a7049a52184e72 < 84b205297fa15f97510342221d8c9a0119711478affected
LinuxLinux2d5f5611dd0de52e9a52b56391a7049a52184e72 < 28d984a66b9e14be74986167b6ad40b5e0daf19aaffected
LinuxLinux2d5f5611dd0de52e9a52b56391a7049a52184e72 < ee944a706a18322b4a2599eebe8040a2994e928faffected
LinuxLinux2d5f5611dd0de52e9a52b56391a7049a52184e72 < 8dbfd8e32a13e116790780ed0be82b5a05eb9916affected
LinuxLinux2d5f5611dd0de52e9a52b56391a7049a52184e72 < 2e509ef60ee41a2da0deb062c262bb530143fb37affected
LinuxLinux2d5f5611dd0de52e9a52b56391a7049a52184e72 < c83e79c0842ed29860648bcce5022ef0ba5001c6affected
LinuxLinux4.6affected
LinuxLinux0 < 4.6unaffected
LinuxLinux6.1.185 <= 6.1.*unaffected
LinuxLinux6.6.154 <= 6.6.*unaffected
LinuxLinux6.12.106 <= 6.12.*unaffected
LinuxLinux6.18.46 <= 6.18.*unaffected
LinuxLinux7.1.10 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References