CVE-2026-74448

Summary

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

drm/amdkfd: fix QID bit leak in pqm_create_queue()

When MES is enabled and amdgpu_amdkfd_alloc_kernel_mem() fails during the first queue creation for a process, pqm_create_queue() returns early via 'return retval' without going through the err_create_queue cleanup label.

This means clear_bit(*qid, pqm->queue_slot_bitmap) is never called, leaving the reserved QID bit permanently set in queue_slot_bitmap. Over time this leaks QID slots, potentially exhausting all available queue slots.

Fix this by replacing 'return retval' with 'goto err_allocate_pqn' so that clear_bit() is always called on the error path without touching the uninitialized pqn pointer.

AILIKFD-813

(cherry picked from commit a107f74c38edbb80d6ab64dcaeeb292c14e9779f)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0f88894aa628680747ae27760e5f627f901a435f < 8924e2594a15bdbd07f8696770864366d787ab70affected
LinuxLinuxc0ef1c8ef70bfa3487ea84f794d7a1f0fea0735d < 2ff5bb3645c72b3690e70c513a62a86600c4632faffected
LinuxLinuxfddc45026311c05a5355fd34b9dc0a1d7eaef4a2 < 5f0f2ddeac738e2ca9d12cb76a1ff2904e85ecc3affected
LinuxLinuxfddc45026311c05a5355fd34b9dc0a1d7eaef4a2 < 7c35bf94150d872e670a6632aa819d320279effbaffected
LinuxLinuxfddc45026311c05a5355fd34b9dc0a1d7eaef4a2 < 38b73293f38658a4685ffcea666462024f858ad9affected
LinuxLinux9d61e2b81f5fc90c87975879809346e7c90ea5f9affected
LinuxLinuxd86ba913bbfd1afafacbfb750001ffc6bfe29da0affected
LinuxLinux6.6.87 < 6.6.151affected
LinuxLinux6.12.23 < 6.12.103affected
LinuxLinux6.13.11 < 6.14affected
LinuxLinux6.14.2 < 6.15affected
LinuxLinux6.15affected
LinuxLinux0 < 6.15unaffected
LinuxLinux6.6.151 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References