CVE-2026-72091 (GCVE-0-2026-72091)
Vulnerability from cvelistv5
Published
2026-08-15 05:52
Modified
2026-08-17 05:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: reject user command submission without a command BO amdxdna_drm_submit_execbuf() passes the user-supplied command BO handle straight into amdxdna_cmd_submit() with drv_cmd == NULL. When the handle is AMDXDNA_INVALID_BO_HANDLE (0), the block that fetches job->cmd_bo is skipped, leaving it NULL, and no check rejects it on the user path (the !job->cmd_bo guard lives inside the != INVALID branch). The job is then armed and pushed to the DRM scheduler. aie2_sched_job_run() takes the drv_cmd == NULL path and calls amdxdna_cmd_set_state(job->cmd_bo) -> amdxdna_gem_vmap(NULL) -> to_gobj(NULL)->dev, a NULL pointer dereference in the drm_sched worker. A process with access to the accel node on a system with a probed AMD NPU can trigger a kernel oops with a single AMDXDNA_EXEC_CMD ioctl (cmd_handles = 0). Only internal driver commands (SYNC_DEBUG_BO / ATTACH_DEBUG_BO) legitimately pass AMDXDNA_INVALID_BO_HANDLE, and they always set drv_cmd. Reject the invalid handle for user submissions (drv_cmd == NULL) at the submit choke point so every user path is covered. Found by 0sec automated security-research tooling (https://0sec.ai).
Impacted products
Vendor Product Version
Linux Linux Version: aac243092b707bb3018e951d470cc1a9bcbaba6c
Version: aac243092b707bb3018e951d470cc1a9bcbaba6c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_ctx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fff6509d976f6fae423a5236391ccdbd7e0e9f06",
              "status": "affected",
              "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
              "versionType": "git"
            },
            {
              "lessThan": "261c1fe3327ad24508f54552c6366e3e4db82c15",
              "status": "affected",
              "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_ctx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: reject user command submission without a command BO\n\namdxdna_drm_submit_execbuf() passes the user-supplied command BO handle\nstraight into amdxdna_cmd_submit() with drv_cmd == NULL. When the handle\nis AMDXDNA_INVALID_BO_HANDLE (0), the block that fetches job-\u003ecmd_bo is\nskipped, leaving it NULL, and no check rejects it on the user path (the\n!job-\u003ecmd_bo guard lives inside the != INVALID branch).\n\nThe job is then armed and pushed to the DRM scheduler.\naie2_sched_job_run() takes the drv_cmd == NULL path and calls\namdxdna_cmd_set_state(job-\u003ecmd_bo) -\u003e amdxdna_gem_vmap(NULL) -\u003e\nto_gobj(NULL)-\u003edev, a NULL pointer dereference in the drm_sched worker.\nA process with access to the accel node on a system with a probed AMD NPU\ncan trigger a kernel oops with a single AMDXDNA_EXEC_CMD ioctl\n(cmd_handles = 0).\n\nOnly internal driver commands (SYNC_DEBUG_BO / ATTACH_DEBUG_BO)\nlegitimately pass AMDXDNA_INVALID_BO_HANDLE, and they always set drv_cmd.\nReject the invalid handle for user submissions (drv_cmd == NULL) at the\nsubmit choke point so every user path is covered.\n\nFound by 0sec automated security-research tooling (https://0sec.ai)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:08:02.275Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fff6509d976f6fae423a5236391ccdbd7e0e9f06"
        },
        {
          "url": "https://git.kernel.org/stable/c/261c1fe3327ad24508f54552c6366e3e4db82c15"
        }
      ],
      "title": "accel/amdxdna: reject user command submission without a command BO",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72091",
    "datePublished": "2026-08-15T05:52:38.366Z",
    "dateReserved": "2026-08-09T03:40:39.905Z",
    "dateUpdated": "2026-08-17T05:08:02.275Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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