In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: fix a job->pasid access race in gpu recovery
Avoid a possible UAF in GPU recovery due to a race between the sched timeout callback and the tdr work queue.
The gpu recovery function calls drm_sched_stop() and later drm_sched_start(). drm_sched_start() restarts the tdr queue which will eventually free the job. If the tdr queue frees the job before time out callback completes, the job will be freed and we'll get a UAF when accessing the pasid. Cache it early to avoid the UAF.
Example KASAN trace: [ 493.058141] BUG: KASAN: slab-use-after-free in amdgpu_device_gpu_recover+0x968/0x990 [amdgpu] [ 493.067530] Read of size 4 at addr ffff88b0ce3f794c by task kworker/u128:1/323 [ 493.074892] [ 493.076485] CPU: 9 UID: 0 PID: 323 Comm: kworker/u128:1 Tainted: G E 6.16.0-1289896.2.zuul.bf4f11df81c1410bbe901c4373305a31 #1 PREEMPT(voluntary) [ 493.076493] Tainted: [E]=UNSIGNED_MODULE [ 493.076495] Hardware name: TYAN B8021G88V2HR-2T/S8021GM2NR-2T, BIOS V1.03.B10 04/01/2019 [ 493.076500] Workqueue: amdgpu-reset-dev drm_sched_job_timedout [gpu_sched] [ 493.076512] Call Trace: [ 493.076515] <TASK> [ 493.076518] dump_stack_lvl+0x64/0x80 [ 493.076529] print_report+0xce/0x630 [ 493.076536] ? _raw_spin_lock_irqsave+0x86/0xd0 [ 493.076541] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 493.076545] ? amdgpu_device_gpu_recover+0x968/0x990 [amdgpu] [ 493.077253] kasan_report+0xb8/0xf0 [ 493.077258] ? amdgpu_device_gpu_recover+0x968/0x990 [amdgpu] [ 493.077965] amdgpu_device_gpu_recover+0x968/0x990 [amdgpu] [ 493.078672] ? __pfx_amdgpu_device_gpu_recover+0x10/0x10 [amdgpu] [ 493.079378] ? amdgpu_coredump+0x1fd/0x4c0 [amdgpu] [ 493.080111] amdgpu_job_timedout+0x642/0x1400 [amdgpu] [ 493.080903] ? pick_task_fair+0x24e/0x330 [ 493.080910] ? __pfx_amdgpu_job_timedout+0x10/0x10 [amdgpu] [ 493.081702] ? _raw_spin_lock+0x75/0xc0 [ 493.081708] ? __pfx__raw_spin_lock+0x10/0x10 [ 493.081712] drm_sched_job_timedout+0x1b0/0x4b0 [gpu_sched] [ 493.081721] ? __pfx__raw_spin_lock_irq+0x10/0x10 [ 493.081725] process_one_work+0x679/0xff0 [ 493.081732] worker_thread+0x6ce/0xfd0 [ 493.081736] ? __pfx_worker_thread+0x10/0x10 [ 493.081739] kthread+0x376/0x730 [ 493.081744] ? __pfx_kthread+0x10/0x10 [ 493.081748] ? __pfx__raw_spin_lock_irq+0x10/0x10 [ 493.081751] ? __pfx_kthread+0x10/0x10 [ 493.081755] ret_from_fork+0x247/0x330 [ 493.081761] ? __pfx_kthread+0x10/0x10 [ 493.081764] ret_from_fork_asm+0x1a/0x30 [ 493.081771] </TASK>
(cherry picked from commit 20880a3fd5dd7bca1a079534cf6596bda92e107d)
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Redhat_linux | — | No solution exists | Aug 4, 2026 | Jan 13, 2026 |
| Ubuntu | — | Upgrade linux-image-6.17.0-1014-raspiUpgrade linux-image-6.17.0-1011-oracleUpgrade linux-image-oracleUpgrade linux-image-6.17.0-1012-gcp-64kUpgrade linux-image-awsUpgrade linux-image-oracle-64k-6.17Upgrade linux-image-6.17.0-22-generic-64kUpgrade linux-image-oracle-6.17Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-gcp-6.17Upgrade linux-image-oem-24.04bUpgrade linux-image-aws-64k-6.17Upgrade linux-image-realtimeUpgrade linux-image-6.17.0-1012-aws-64kUpgrade linux-image-6.17.0-1013-azureUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-raspiUpgrade linux-image-oem-24.04cUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-generic-64k-6.17Upgrade linux-image-oem-6.17Upgrade linux-image-raspi-6.17Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-oem-24.04aUpgrade linux-image-gcpUpgrade linux-image-6.17.0-22-genericUpgrade linux-image-6.17.0-1012-gcpUpgrade linux-image-oem-24.04dUpgrade linux-image-virtual-6.17Upgrade linux-image-6.17.0-1011-oracle-64kUpgrade linux-image-realtime-6.17Upgrade linux-image-generic-64kUpgrade linux-image-generic-6.17Upgrade linux-image-aws-64kUpgrade linux-image-azure-6.17Upgrade linux-image-6.17.0-1012-awsUpgrade linux-image-genericUpgrade linux-image-virtualUpgrade linux-image-azureUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-aws-6.17Upgrade linux-image-6.17.0-1020-oemUpgrade linux-image-oem-24.04Upgrade linux-image-6.17.0-1010-realtime | Apr 17, 2026 | Jan 13, 2026 |
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