CVE-2026-72091 (GCVE-0-2026-72091)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-17 05:08
VLAI
Title
accel/amdxdna: reject user command submission without a command BO
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).
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: aac243092b707bb3018e951d470cc1a9bcbaba6c , < fff6509d976f6fae423a5236391ccdbd7e0e9f06 (git)
Affected: aac243092b707bb3018e951d470cc1a9bcbaba6c , < 261c1fe3327ad24508f54552c6366e3e4db82c15 (git)
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Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_ctx.c"
          ],
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      "cpeApplicability": [
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          "nodes": [
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                  "versionStartIncluding": "6.14",
                  "vulnerable": true
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      "descriptions": [
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          "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",
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  "cveMetadata": {
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    "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"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-21",
      "epss": "0.00198",
      "percentile": "0.09805"
    },
    "nvd": {
      "cve": {
        "affected": [
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                "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",
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                    "versionType": "git"
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                "vendor": "Linux",
                "versions": [
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            ],
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          }
        ],
        "cveTags": [],
        "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)."
          }
        ],
        "id": "CVE-2026-72091",
        "lastModified": "2026-08-17T06:18:08.050",
        "metrics": {},
        "published": "2026-08-15T06:21:23.180",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/261c1fe3327ad24508f54552c6366e3e4db82c15"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/fff6509d976f6fae423a5236391ccdbd7e0e9f06"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T21:42:52+00:00",
      "cve": "CVE-2026-72091",
      "id": "CVE-2026-72091",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: accel/amdxdna: reject user command submission without a command BO",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72091.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:30:01Z",
      "cve": "CVE-2026-72091",
      "id": "CVE-2026-72091",
      "initial_release_date": "2026-08-28T01:00:53Z",
      "product_status:known_affected": "12",
      "product_status:known_not_affected": "350",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-72091",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72091.json",
      "version": "4"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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