CVE-2026-68259

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Check bounds in allocate_event_notification_slot The valid event ids go from 0 to KFD_SIGNAL_EVENT_LIMIT allocate_event_notification_slot has an option to specify an event id to allocate at, used by CRIU. We weren't checking the bounds on that value. Check them. v2: Lower bounds check is unecessary because of idr_alloc already rejecting negative numbers. Upper bounds check should be KFD_SIGNAL_EVENT_LIMIT since the signal mode mappings might not yet exist (cherry picked from commit 6853f1f6cbbeb3f53ebbbd7286536aeb2c5d5f50)

References

• https://git.kernel.org/stable/c/4622214f0542f64b02c250db0f9c677eeb032d9b
• https://git.kernel.org/stable/c/50319efb865f72db45f191c8709511746d58ee0a
• https://git.kernel.org/stable/c/85eedff5f0c4aba5a66bc37a1bd6bcecd0d77b53
• https://git.kernel.org/stable/c/abeeb1947d81610c65349db4d89c6151f270e136
• https://git.kernel.org/stable/c/bb52249fbbe948875155ccd45cd8d74bf4ae747b