CVE-2026-68233

Summary

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

drm/vc4: Shut down BO cache timer before teardown

The BO cache timer callback schedules time_work, and time_work can rearm the timer through vc4_bo_cache_free_old().

vc4_bo_cache_destroy() deletes the timer and then cancels the work, which does not break that cycle: the work being cancelled can rearm the timer, and the timer then queues work again after teardown.

Use timer_shutdown_sync() instead, so the timer cannot be rearmed and the cycle ends with cancel_work_sync().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc826a6e1064419f78855463cf29ce9e8b9d25bf4 < a38f2724eb93a78ba250b01e0caf3468df4d3956affected
LinuxLinuxc826a6e1064419f78855463cf29ce9e8b9d25bf4 < bac4c1a9af690b8635c6924872075c41d8763ed9affected
LinuxLinuxc826a6e1064419f78855463cf29ce9e8b9d25bf4 < 6273dd3ffb54ec581855b82ae77331b66028249caffected
LinuxLinux4.5affected
LinuxLinux0 < 4.5unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References