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accel/amdxdna: Fix use-after-free of mm_struct in job scheduler

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix use-after-free of mm_struct in job scheduler amdxdna_cmd_submit() stores current->mm in job->mm without holding any reference. aie2_sched_job_run() later access job->mm from the DRM scheduler worker thread. With only a raw pointer and no structural reference, the mm_struct can be freed before the scheduler runs the job. Fix this by calling mmgrab() to hold a structural mm_count reference for the lifetime of the job, paired with mmdrop() in every cleanup path.

Products
Kernel
Affected versions
Not specified
Fixed versions
6.18.42, 7.1.6
CVEs
CVE-2026-68380
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 01:53 UTC · Revision 1

Source evidence

accel/amdxdna: Fix use-after-free of mm_struct in job scheduler

core-osv · Original source

Published 10 Aug 2026, 12:03 UTC

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix use-after-free of mm_struct in job scheduler amdxdna_cmd_submit() stores current->mm in job->mm without holding any reference. aie2_sched_job_run() later access job->mm from the DRM scheduler worker thread. With only a raw pointer and no structural reference, the mm_struct can be freed before the scheduler runs the job. Fix this by calling mmgrab() to hold a structural mm_count reference for the lifetime of the job, paired with mmdrop() in every cleanup path.

osv:CVE-2026-68380

Kernel

Fixed versions: 6.18.42, 7.1.6

Complete source record
{
  "id": "ef46027ba009f19d77bd6fb114faf723b0fcbf9f734d66216e93740ea33cbddc",
  "url": "https://osv.dev/vulnerability/CVE-2026-68380",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "accel/amdxdna: Fix use-after-free of mm_struct in job scheduler",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix use-after-free of mm_struct in job scheduler amdxdna_cmd_submit() stores current->mm in job->mm without holding any reference. aie2_sched_job_run() later access job->mm from the DRM scheduler worker thread. With only a raw pointer and no structural reference, the mm_struct can be freed before the scheduler runs the job. Fix this by calling mmgrab() to hold a structural mm_count reference for the lifetime of the job, paired with mmdrop() in every cleanup path.",
    "evidence": "osv:CVE-2026-68380",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-68380",
      "aliases": [
        "CVE-2026-68380"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "aac243092b707bb3018e951d470cc1a9bcbaba6c"
                },
                {
                  "fixed": "6875ee2bef48f5d9f045d81a8a4d68893f768a8a"
                },
                {
                  "fixed": "e8fadbffc19a233d1eedebfb8df0f522d1388280"
                },
                {
                  "fixed": "faebb7ba1ac65fa5810b640df02ce04e509fdc11"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68380.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.18.42"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68380.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.729416436Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6875ee2bef48f5d9f045d81a8a4d68893f768a8a",
        "https://git.kernel.org/stable/c/e8fadbffc19a233d1eedebfb8df0f522d1388280",
        "https://git.kernel.org/stable/c/faebb7ba1ac65fa5810b640df02ce04e509fdc11",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68380.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68380",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68380.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68380",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517135,
  "published_at": "2026-08-10T12:03:58.536+00:00"
}