CVE-2026-89807 (GCVE-0-2026-89807)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:30 – Updated: 2026-10-19 08:53
VLAI
Title
drm/amdkfd: guard against NULL restore_mqd in CRIU queue restore
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: guard against NULL restore_mqd in CRIU queue restore Both create_queue_cpsch() and create_queue_nocpsch() unconditionally call mqd_mgr->restore_mqd() when a CRIU restore is in progress (qd != NULL), with no NULL guard. On any system where restore_mqd is not implemented for the given queue type, a user holding CAP_CHECKPOINT_RESTORE can trigger a kernel NULL pointer dereference and panic the machine by issuing KFD_IOC_CRIU_OP_RESTORE with a crafted queue restore object. Note that checkpoint_mqd is likewise unimplemented on GFX12, so no legitimate CRIU image can reach this path — only a hand-crafted restore payload. Add a NULL guard for restore_mqd immediately after mqd_mgr is resolved, unwinding via the existing error labels and returning -EOPNOTSUPP if the callback is not implemented. This mirrors the existing checkpoint_mqd guard in checkpoint_mqd().
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6650 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < 19c73848493ab58e39649700da6de11710a36de1 (git)
Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21 (git)
Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < c643c229babe2e8efc5eefe60e19d44868a643ff (git)
Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < 6aa530642f95d5c48aa336416f94a35e7949b647 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "vendor": "Linux",
          "versions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: guard against NULL restore_mqd in CRIU queue restore\n\nBoth create_queue_cpsch() and create_queue_nocpsch() unconditionally\ncall mqd_mgr-\u003erestore_mqd() when a CRIU restore is in progress\n(qd != NULL), with no NULL guard. On any system where restore_mqd is\nnot implemented for the given queue type, a user holding\nCAP_CHECKPOINT_RESTORE can trigger a kernel NULL pointer dereference\nand panic the machine by issuing KFD_IOC_CRIU_OP_RESTORE with a\ncrafted queue restore object. Note that checkpoint_mqd is likewise\nunimplemented on GFX12, so no legitimate CRIU image can reach this\npath \u2014 only a hand-crafted restore payload.\n\nAdd a NULL guard for restore_mqd immediately after mqd_mgr is\nresolved, unwinding via the existing error labels and returning\n-EOPNOTSUPP if the callback is not implemented. This mirrors the\nexisting checkpoint_mqd guard in checkpoint_mqd()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:53:01.788Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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    "cveId": "CVE-2026-89807",
    "datePublished": "2026-09-16T10:30:40.572Z",
    "dateReserved": "2026-09-11T19:38:34.767Z",
    "dateUpdated": "2026-10-19T08:53:01.788Z",
    "state": "PUBLISHED"
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      "percentile": "0.09928"
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      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
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      "title": "drm/amdkfd: guard against NULL restore_mqd in CRIU queue restore",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: guard against NULL restore_mqd in CRIU queue restore\n\nBoth create_queue_cpsch() and create_queue_nocpsch() unconditionally\ncall mqd_mgr-\u003erestore_mqd() when a CRIU restore is in progress\n(qd != NULL), with no NULL guard. On any system where restore_mqd is\nnot implemented for the given queue type, a user holding\nCAP_CHECKPOINT_RESTORE can trigger a kernel NULL pointer dereference\nand panic the machine by issuing KFD_IOC_CRIU_OP_RESTORE with a\ncrafted queue restore object. Note that checkpoint_mqd is likewise\nunimplemented on GFX12, so no legitimate CRIU image can reach this\npath \u2014 only a hand-crafted restore payload.\n\nAdd a NULL guard for restore_mqd immediately after mqd_mgr is\nresolved, unwinding via the existing error labels and returning\n-EOPNOTSUPP if the callback is not implemented. This mirrors the\nexisting checkpoint_mqd guard in checkpoint_mqd()."
          }
        ],
        "id": "CVE-2026-89807",
        "lastModified": "2026-10-19T09:18:24.527",
        "metrics": {},
        "published": "2026-09-16T11:16:45.817",
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89807.json",
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}



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