FKIE_CVE-2026-89807

Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 11:16
Severity
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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19c73848493ab58e39649700da6de11710a36de1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6aa530642f95d5c48aa336416f94a35e7949b647
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c643c229babe2e8efc5eefe60e19d44868a643ff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "19c73848493ab58e39649700da6de11710a36de1",
              "status": "affected",
              "version": "48f0bdf4e38e42b8285622cfcfc7e6e490b1a719",
              "versionType": "git"
            },
            {
              "lessThan": "ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21",
              "status": "affected",
              "version": "48f0bdf4e38e42b8285622cfcfc7e6e490b1a719",
              "versionType": "git"
            },
            {
              "lessThan": "c643c229babe2e8efc5eefe60e19d44868a643ff",
              "status": "affected",
              "version": "48f0bdf4e38e42b8285622cfcfc7e6e490b1a719",
              "versionType": "git"
            },
            {
              "lessThan": "6aa530642f95d5c48aa336416f94a35e7949b647",
              "status": "affected",
              "version": "48f0bdf4e38e42b8285622cfcfc7e6e490b1a719",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "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",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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": "2026-09-16T11:16:45.817",
  "metrics": {},
  "published": "2026-09-16T11:16:45.817",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/19c73848493ab58e39649700da6de11710a36de1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6aa530642f95d5c48aa336416f94a35e7949b647"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c643c229babe2e8efc5eefe60e19d44868a643ff"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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