CVE-2026-93047 (GCVE-0-2026-93047)
Vulnerability from cvelistv5
Published
2026-09-17 16:10
Modified
2026-10-19 09:04
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Associate BOs with every job that accesses them A submission can expand into a chain of jobs (e.g. bin + render + cache clean). Implicit synchronization in v3d_submit_lock_reservations() is gated on each job's bo[], but the BO list was only ever attached to the last job of the chain. When that last job is a trailing CACHE_CLEAN job, the job that actually consumes the BOs (that is, a RENDER or CSD job) was left with bo_count == 0 and picked up no implicit dependencies. It could therefore be dispatched to the hardware and read a BO while another context was still writing it, leading to data corruption. Attach the BOs to the job that consumes them, so (1) it acquires the correct implicit dependencies during reservation locking and (2) they are kept mapped until the end of the submission. Give it references to all consuming job's BOs through v3d_job_reference_bos() instead of looking the handles up a second time; that avoids a redundant lookup and guarantees both jobs reference the exact same objects. As the CACHE_CLEAN job now carries a BO array as well, add a per-job `has_implicit_dep` flag so that only the consuming jobs take implicit dependencies. The CACHE_CLEAN job (a global flush) and the BIN job (binning waiting on another context is not a realistic scenario) are excluded.
References
Impacted products
Vendor Product Version
Linux Linux Version: dffa9b7a78c4361e55e21b3acb54e0d34ad15ea0
Version: dffa9b7a78c4361e55e21b3acb54e0d34ad15ea0
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_drv.h",
            "drivers/gpu/drm/v3d/v3d_submit.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7244dd0f12629484a1936dc5c5837670d8d9f80c",
              "status": "affected",
              "version": "dffa9b7a78c4361e55e21b3acb54e0d34ad15ea0",
              "versionType": "git"
            },
            {
              "lessThan": "fa98563ab00dbe62fcedfef6bdd34ded7a860d9f",
              "status": "affected",
              "version": "dffa9b7a78c4361e55e21b3acb54e0d34ad15ea0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_drv.h",
            "drivers/gpu/drm/v3d/v3d_submit.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": "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": "7.2.6",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/v3d: Associate BOs with every job that accesses them\n\nA submission can expand into a chain of jobs (e.g. bin + render + cache\nclean). Implicit synchronization in v3d_submit_lock_reservations() is gated\non each job\u0027s bo[], but the BO list was only ever attached to the last job\nof the chain. When that last job is a trailing CACHE_CLEAN job, the job\nthat actually consumes the BOs (that is, a RENDER or CSD job) was left with\nbo_count == 0 and picked up no implicit dependencies. It could therefore\nbe dispatched to the hardware and read a BO while another context was still\nwriting it, leading to data corruption.\n\nAttach the BOs to the job that consumes them, so (1) it acquires the\ncorrect implicit dependencies during reservation locking and (2) they are\nkept mapped until the end of the submission. Give it references to all\nconsuming job\u0027s BOs through v3d_job_reference_bos() instead of looking the\nhandles up a second time; that avoids a redundant lookup and guarantees\nboth jobs reference the exact same objects.\n\nAs the CACHE_CLEAN job now carries a BO array as well, add a per-job\n`has_implicit_dep` flag so that only the consuming jobs take implicit\ndependencies. The CACHE_CLEAN job (a global flush) and the BIN job (binning\nwaiting on another context is not a realistic scenario) are excluded."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:04:42.363Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7244dd0f12629484a1936dc5c5837670d8d9f80c"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa98563ab00dbe62fcedfef6bdd34ded7a860d9f"
        }
      ],
      "title": "drm/v3d: Associate BOs with every job that accesses them",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93047",
    "datePublished": "2026-09-17T16:10:38.350Z",
    "dateReserved": "2026-09-17T15:57:05.658Z",
    "dateUpdated": "2026-10-19T09:04:42.363Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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