CVE-2025-68793 (GCVE-0-2025-68793)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-01-13 15:29
VLAI?
Title
drm/amdgpu: fix a job->pasid access race in gpu recovery
Summary
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)
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a72002cb181f350734108228b24c5d10d358f95a , < dac58c012c47cadf337a35eb05d44498c43e5cd0 (git)
Affected: a72002cb181f350734108228b24c5d10d358f95a , < 77f73253015cbc7893fca1821ac3eae9eb4bc943 (git)
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    Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dac58c012c47cadf337a35eb05d44498c43e5cd0",
              "status": "affected",
              "version": "a72002cb181f350734108228b24c5d10d358f95a",
              "versionType": "git"
            },
            {
              "lessThan": "77f73253015cbc7893fca1821ac3eae9eb4bc943",
              "status": "affected",
              "version": "a72002cb181f350734108228b24c5d10d358f95a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc2",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix a job-\u003epasid 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\u0027ll 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]  \u003cTASK\u003e\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]  \u003c/TASK\u003e\n\n(cherry picked from commit 20880a3fd5dd7bca1a079534cf6596bda92e107d)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-13T15:29:04.877Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dac58c012c47cadf337a35eb05d44498c43e5cd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/77f73253015cbc7893fca1821ac3eae9eb4bc943"
        }
      ],
      "title": "drm/amdgpu: fix a job-\u003epasid access race in gpu recovery",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68793",
    "datePublished": "2026-01-13T15:29:04.877Z",
    "dateReserved": "2025-12-24T10:30:51.037Z",
    "dateUpdated": "2026-01-13T15:29:04.877Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68793\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:16:01.197\",\"lastModified\":\"2026-01-13T16:16:01.197\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: fix a job-\u003epasid 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\u0027ll 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]  \u003cTASK\u003e\\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]  \u003c/TASK\u003e\\n\\n(cherry picked from commit 20880a3fd5dd7bca1a079534cf6596bda92e107d)\"}],\"metrics\":{},\"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\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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