CVE-2025-68793
Full vulnerability record from the local CVENow database.
Description
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)
View original CVE JSON
{
"id": "CVE-2025-68793",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-01-13T16:16:01.197",
"lastModified": "2026-10-19T19:17:05.243",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix a job->pasid access race in gpu recovery\n\nAvoid a possible UAF in GPU recovery due to a race between\nthe sched timeout callback and the tdr work queue.\n\nThe gpu recovery function calls drm_sched_stop() and\nlater drm_sched_start(). drm_sched_start() restarts\nthe tdr queue which will eventually free the job. If\nthe tdr queue frees the job before time out callback\ncompletes, the job will be freed and we'll get a UAF\nwhen accessing the pasid. Cache it early to avoid the\nUAF.\n\nExample KASAN trace:\n[ 493.058141] BUG: KASAN: slab-use-after-free in amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.067530] Read of size 4 at addr ffff88b0ce3f794c by task kworker/u128:1/323\n[ 493.074892]\n[ 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)\n[ 493.076493] Tainted: [E]=UNSIGNED_MODULE\n[ 493.076495] Hardware name: TYAN B8021G88V2HR-2T/S8021GM2NR-2T, BIOS V1.03.B10 04/01/2019\n[ 493.076500] Workqueue: amdgpu-reset-dev drm_sched_job_timedout [gpu_sched]\n[ 493.076512] Call Trace:\n[ 493.076515] <TASK>\n[ 493.076518] dump_stack_lvl+0x64/0x80\n[ 493.076529] print_report+0xce/0x630\n[ 493.076536] ? _raw_spin_lock_irqsave+0x86/0xd0\n[ 493.076541] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 493.076545] ? amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.077253] kasan_report+0xb8/0xf0\n[ 493.077258] ? amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.077965] amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.078672] ? __pfx_amdgpu_device_gpu_recover+0x10/0x10 [amdgpu]\n[ 493.079378] ? amdgpu_coredump+0x1fd/0x4c0 [amdgpu]\n[ 493.080111] amdgpu_job_timedout+0x642/0x1400 [amdgpu]\n[ 493.080903] ? pick_task_fair+0x24e/0x330\n[ 493.080910] ? __pfx_amdgpu_job_timedout+0x10/0x10 [amdgpu]\n[ 493.081702] ? _raw_spin_lock+0x75/0xc0\n[ 493.081708] ? __pfx__raw_spin_lock+0x10/0x10\n[ 493.081712] drm_sched_job_timedout+0x1b0/0x4b0 [gpu_sched]\n[ 493.081721] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 493.081725] process_one_work+0x679/0xff0\n[ 493.081732] worker_thread+0x6ce/0xfd0\n[ 493.081736] ? __pfx_worker_thread+0x10/0x10\n[ 493.081739] kthread+0x376/0x730\n[ 493.081744] ? __pfx_kthread+0x10/0x10\n[ 493.081748] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 493.081751] ? __pfx_kthread+0x10/0x10\n[ 493.081755] ret_from_fork+0x247/0x330\n[ 493.081761] ? __pfx_kthread+0x10/0x10\n[ 493.081764] ret_from_fork_asm+0x1a/0x30\n[ 493.081771] </TASK>\n\n(cherry picked from commit 20880a3fd5dd7bca1a079534cf6596bda92e107d)"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/amdgpu: soluciona una condición de carrera de acceso a job->pasid en la recuperación de la GPU\n\nEvita un posible UAF en la recuperación de la GPU debido a una condición de carrera entre el callback de tiempo de espera de sched y la cola de trabajo tdr.\n\nLa función de recuperación de la GPU llama a drm_sched_stop() y luego a drm_sched_start(). drm_sched_start() reinicia la cola tdr que eventualmente liberará el trabajo (job). Si la cola tdr libera el trabajo (job) antes de que el callback de tiempo de espera se complete, el trabajo (job) será liberado y obtendremos un UAF al acceder al pasid. Almacenarlo en caché con antelación para evitar el UAF.\n\nEjemplo de traza KASAN:\n[ 493.058141] ERROR: KASAN: uso-después-de-liberación de slab en amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.067530] Lectura de tamaño 4 en la dirección ffff88b0ce3f794c por la tarea kworker/u128:1/323\n[ 493.074892]\n[ 493.076485] CPU: 9 UID: 0 PID: 323 Comm: kworker/u128:1 Tainted: G E 6.16.0-1289896.2.zuul.bf4f11df81c1410bbe901c4373305a31 #1 PREEMPT(voluntario)\n[ 493.076493] Tainted: [E]=UNSIGNED_MODULE\n[ 493.076495] Hardware name: TYAN B8021G88V2HR-2T/S8021GM2NR-2T, BIOS V1.03.B10 04/01/2019\n[ 493.076500] Workqueue: amdgpu-reset-dev drm_sched_job_timedout [gpu_sched]\n[ 493.076512] Traza de Llamada:\n[ 493.076515] \n[ 493.076518] dump_stack_lvl+0x64/0x80\n[ 493.076529] print_report+0xce/0x630\n[ 493.076536] ? _raw_spin_lock_irqsave+0x86/0xd0\n[ 493.076541] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 493.076545] ? amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.077253] kasan_report+0xb8/0xf0\n[ 493.077258] ? amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.077965] amdgpu_device_gpu_recover+0x968/0x990 [amdgpu]\n[ 493.078672] ? __pfx_amdgpu_device_gpu_recover+0x10/0x10 [amdgpu]\n[ 493.079378] ? amdgpu_coredump+0x1fd/0x4c0 [amdgpu]\n[ 493.080111] amdgpu_job_timedout+0x642/0x1400 [amdgpu]\n[ 493.080903] ? pick_task_fair+0x24e/0x330\n[ 493.080910] ? __pfx_amdgpu_job_timedout+0x10/0x10 [amdgpu]\n[ 493.081702] ? _raw_spin_lock+0x75/0xc0\n[ 493.081708] ? __pfx__raw_spin_lock+0x10/0x10\n[ 493.081712] drm_sched_job_timedout+0x1b0/0x4b0 [gpu_sched]\n[ 493.081721] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 493.081725] process_one_work+0x679/0xff0\n[ 493.081732] worker_thread+0x6ce/0xfd0\n[ 493.081736] ? __pfx_worker_thread+0x10/0x10\n[ 493.081739] kthread+0x376/0x730\n[ 493.081744] ? __pfx_kthread+0x10/0x10\n[ 493.081748] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 493.081751] ? __pfx_kthread+0x10/0x10\n[ 493.081755] ret_from_fork+0x247/0x330\n[ 493.081761] ? __pfx_kthread+0x10/0x10\n[ 493.081764] ret_from_fork_asm+0x1a/0x30\n[ 493.081771] \n\n(seleccionado de la confirmación 20880a3fd5dd7bca1a079534cf6596bda92e107d)"
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_device.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "a72002cb181f350734108228b24c5d10d358f95a",
"lessThan": "dac58c012c47cadf337a35eb05d44498c43e5cd0",
"versionType": "git",
"status": "affected"
},
{
"version": "a72002cb181f350734108228b24c5d10d358f95a",
"lessThan": "77f73253015cbc7893fca1821ac3eae9eb4bc943",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/amdgpu_device.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.17",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.17",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.3",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.19",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-16T15:05:14.438714Z",
"id": "CVE-2025-68793",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/77f73253015cbc7893fca1821ac3eae9eb4bc943",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/dac58c012c47cadf337a35eb05d44498c43e5cd0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}