CVE-2026-93192 (GCVE-0-2026-93192)
Vulnerability from cvelistv5
Published
2026-09-17 16:12
Modified
2026-10-21 12:52
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Clear queue->active_job when v3d_fence_create() fails The run_job() callbacks for BIN, RENDER, TFU and CSD assign the incoming job to queue->active_job before calling v3d_fence_create(). If v3d_fence_create() fails, the callback returns NULL without clearing active_job, leaving a dangling pointer. Create a failure path in all run_job() callbacks that clears the active job before returning NULL. The BIN path takes queue->queue_lock around the clear as it races against v3d_overflow_mem_work(); RENDER, TFU and CSD paths have no concurrent reader, so the clear is lock-free.
References
Impacted products
Vendor Product Version
Linux Linux Version: a783a09ee76d6259296dc6aeea2b6884fa526980
Version: a783a09ee76d6259296dc6aeea2b6884fa526980
Version: a783a09ee76d6259296dc6aeea2b6884fa526980
Version: a783a09ee76d6259296dc6aeea2b6884fa526980
Version: a783a09ee76d6259296dc6aeea2b6884fa526980
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_sched.c"
          ],
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_sched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "5.3",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
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                {
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/v3d: Clear queue-\u003eactive_job when v3d_fence_create() fails\n\nThe run_job() callbacks for BIN, RENDER, TFU and CSD assign the incoming\njob to queue-\u003eactive_job before calling v3d_fence_create(). If\nv3d_fence_create() fails, the callback returns NULL without clearing\nactive_job, leaving a dangling pointer.\n\nCreate a failure path in all run_job() callbacks that clears the active\njob before returning NULL. The BIN path takes queue-\u003equeue_lock around the\nclear as it races against v3d_overflow_mem_work(); RENDER, TFU and CSD\npaths have no concurrent reader, so the clear is lock-free."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The dangling queue-\u003eactive_job is created in v3d_bin_job_run/v3d_render_job_run/v3d_tfu_job_run/v3d_csd_job_run after DRM_IOCTL_V3D_SUBMIT_CL (v3d_submit_cl_ioctl), DRM_IOCTL_V3D_SUBMIT_TFU, or DRM_IOCTL_V3D_SUBMIT_CSD on /dev/dri/renderD* queues a job through v3d_push_job; the trigger is that local ioctl, not a remote protocol message.\nAC:L - v3d_fence_create() fails only on kzalloc of struct v3d_fence; the attacker submits the job first so ioctl-time allocations succeed, then applies memory pressure so the scheduler worker hits GFP_KERNEL ENOMEM, and can also drive v3d_overflow_mem_work via a BCL that raises V3D_INT_OUTOMEM, controlling both the failure and the UAF consumer.\nPR:L - v3d_submit_cl_ioctl/v3d_submit_tfu_ioctl/v3d_submit_csd_ioctl are DRM_RENDER_ALLOW|DRM_AUTH with no capable() check; drm_ioctl_permit() treats render-node clients as authenticated, so an unprivileged Raspberry Pi/video-group user (or GPU-passthrough container) with /dev/dri/renderD* can reach the run_job callbacks.\nUI:N - The attacker opens the render node and issues their own SUBMIT_CL/SUBMIT_TFU/SUBMIT_CSD ioctls plus memory pressure; no other user must mount media, open a file, or otherwise interact.\nS:U - The use-after-free is of a host-kernel v3d_job left in queue-\u003eactive_job and later used by v3d_overflow_mem_work/v3d_irq_signal_fence, which is local kernel heap corruption/privilege escalation, not a KVM/Xen escape or IOMMU/DMA boundary bypass.\nC:H - After drm_sched_job_done/v3d_sched_job_free kfree\u0027s the job, v3d_overflow_mem_work still reads bin_job-\u003erender and v3d_irq_signal_fence reads active_job-\u003eirq_fence and stats from the freed slab, so heap reuse of the v3d_job yields an arbitrary kernel read.\nI:H - v3d_overflow_mem_work does list_add_tail(\u0026bo-\u003eunref_head, \u0026bin_job-\u003erender-\u003eunref_list) through the freed job, so spraying a replacement v3d_bin_job with a chosen render pointer is an arbitrary list-write; v3d_job_update_stats() likewise writes into the freed object.\nA:H - Dereferencing the dangling queue-\u003eactive_job in v3d_irq_signal_fence (IRQ context) or v3d_overflow_mem_work after v3d_job_free() oopses or panics the kernel, matching other v3d active-job UAFs that produced fatal exceptions in v3d_irq()."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:52:15.181Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1f661f42beb558b2d21882f0cd527ed6c8e7e749"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdeb73d7312100e00c3e643ff233f09b6ec114aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a8aa74859dd73eaa76c55eb74da708e56ef51c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b9878aba5cf93bc2b55ba9eb807757ce3239bec"
        },
        {
          "url": "https://git.kernel.org/stable/c/25a1669907512e927fab9ad4d4fb74ff57f63cd9"
        }
      ],
      "title": "drm/v3d: Clear queue-\u003eactive_job when v3d_fence_create() fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93192",
    "datePublished": "2026-09-17T16:12:16.428Z",
    "dateReserved": "2026-09-17T16:02:15.092Z",
    "dateUpdated": "2026-10-21T12:52:15.181Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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