Threats Tagged 'cve-2026-53144'

A vulnerability in the Linux kernel's AMD KFD driver (drm/amdkfd) allows a NULL pointer dereference in the get_queue_ids() function. This occurs when userspace supplies a non-zero number of queues but a NULL pointer for the queue ID array, leading to a kernel panic. The issue arises because the function returns NULL without proper error indication, and subsequent code dereferences this NULL pointer. This has been fixed by returning an error pointer when the pointer is absent and the number of queues is non-zero.

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix NULL dereference in get_queue_ids() When usr_queue_id_array is NULL and num_queues is non-zero, get_queue_ids() returns NULL. The callers check only IS_ERR() on the return value; since IS_ERR(NULL) == false the check passes, and suspend_queues() calls q_array_invalidate() which immediately dereferences NULL while iterating num_queues times. Userspace can trigger this via kfd_ioctl_set_debug_trap() by supplying num_queues > 0 with a zero queue_array_ptr, causing a kernel panic. A NULL usr_queue_id_array with num_queues == 0 is a legitimate no-op (q_array_invalidate never executes, and resume_queues already guards all queue_ids dereferences behind a NULL check). Return ERR_PTR(-EINVAL) only when num_queues is non-zero and the pointer is absent; both callers already propagate IS_ERR() returns correctly to userspace. (cherry picked from commit f165a82cdf503884bb1797771c61b2fcc72113d4)