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GHSA-4J65-QCR2-QW3X

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30

Details

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().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89807"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:16:45Z",
    "severity": null
  },
  "details": "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": "GHSA-4j65-qcr2-qw3x",
  "modified": "2026-09-16T12:30:37Z",
  "published": "2026-09-16T12:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89807"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19c73848493ab58e39649700da6de11710a36de1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6aa530642f95d5c48aa336416f94a35e7949b647"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c643c229babe2e8efc5eefe60e19d44868a643ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-09-16 10:30 – Updated: 2026-09-16 10:30

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 mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/19c73848493ab58e3…
https://git.kernel.org/stable/c/ebffa44e7a21ead59…
https://git.kernel.org/stable/c/c643c229babe2e8ef…
https://git.kernel.org/stable/c/6aa530642f95d5c48…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < 19c73848493ab58e39649700da6de11710a36de1 (git) Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21 (git) Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < c643c229babe2e8efc5eefe60e19d44868a643ff (git) Affected: 48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 , < 6aa530642f95d5c48aa336416f94a35e7949b647 (git)
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-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "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",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "19c73848493ab58e39649700da6de11710a36de1",
              "status": "affected",
              "version": "48f0bdf4e38e42b8285622cfcfc7e6e490b1a719",
              "versionType": "git"
            },
            {
              "lessThan": "ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21",
              "status": "affected",
              "version": "48f0bdf4e38e42b8285622cfcfc7e6e490b1a719",
              "versionType": "git"
            },
            {
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              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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": "2026-09-16T10:30:40.572Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/6aa530642f95d5c48aa336416f94a35e7949b647"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89807",
    "datePublished": "2026-09-16T10:30:40.572Z",
    "dateReserved": "2026-09-11T19:38:34.767Z",
    "dateUpdated": "2026-09-16T10:30:40.572Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-4J65-QCR2-QW3X

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

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