Vulnerability-Lookup

GHSA-XGPC-Q5WR-Q4V5

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm

The cleanup tail of kfd_criu_resume_svm() walks svms->criu_svm_metadata_list and kfree()s each struct criu_svm_metadata without removing it from the list. The list head is left pointing at freed kmalloc-96 objects.

A second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty() reads the dangling ->next (use-after-free), the loop walks freed entries, and each is kfree()'d again (double-free). This is reachable by an unprivileged render-group user via /dev/kfd with no capabilities required.

Add list_del() before the kfree() so the list is properly emptied. The list_for_each_entry_safe() iterator already caches the next pointer, so unlinking during the walk is safe.

(cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72449"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:18Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix list_del corruption in kfd_criu_resume_svm\n\nThe cleanup tail of kfd_criu_resume_svm() walks\nsvms-\u003ecriu_svm_metadata_list and kfree()s each struct criu_svm_metadata\nwithout removing it from the list. The list head is left pointing at\nfreed kmalloc-96 objects.\n\nA second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty()\nreads the dangling -\u003enext (use-after-free), the loop walks freed entries,\nand each is kfree()\u0027d again (double-free). This is reachable by an\nunprivileged render-group user via /dev/kfd with no capabilities required.\n\nAdd list_del() before the kfree() so the list is properly emptied. The\nlist_for_each_entry_safe() iterator already caches the next pointer, so\nunlinking during the walk is safe.\n\n(cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)",
  "id": "GHSA-xgpc-q5wr-q4v5",
  "modified": "2026-08-17T06:33:30Z",
  "published": "2026-08-15T06:32:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72449"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/506e635aed05dbdeef11e3c59f6e42980cda5b6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/838b57b3e7ce8cce0fda56d0861add3d464dd6c8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fa5655da368d0306c03e9dc9cda8ae2a7840926"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96ac562a9ea3020981f536384711190841c81aa8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8a8d350a273c005a48c64c4519d21b2a51c5ceb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e33a3bd5cb8d0cf1557dee014115f812c9686130"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72449 (GCVE-0-2026-72449)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:56 – Updated: 2026-08-17 05:44

Title

drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm The cleanup tail of kfd_criu_resume_svm() walks svms->criu_svm_metadata_list and kfree()s each struct criu_svm_metadata without removing it from the list. The list head is left pointing at freed kmalloc-96 objects. A second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty() reads the dangling ->next (use-after-free), the loop walks freed entries, and each is kfree()'d again (double-free). This is reachable by an unprivileged render-group user via /dev/kfd with no capabilities required. Add list_del() before the kfree() so the list is properly emptied. The list_for_each_entry_safe() iterator already caches the next pointer, so unlinking during the walk is safe. (cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/c8a8d350a273c005a…
https://git.kernel.org/stable/c/506e635aed05dbdee…
https://git.kernel.org/stable/c/838b57b3e7ce8cce0…
https://git.kernel.org/stable/c/96ac562a9ea302098…
https://git.kernel.org/stable/c/e33a3bd5cb8d0cf15…
https://git.kernel.org/stable/c/8fa5655da368d0306…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < c8a8d350a273c005a48c64c4519d21b2a51c5ceb (git) Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 506e635aed05dbdeef11e3c59f6e42980cda5b6d (git) Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 838b57b3e7ce8cce0fda56d0861add3d464dd6c8 (git) Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 96ac562a9ea3020981f536384711190841c81aa8 (git) Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < e33a3bd5cb8d0cf1557dee014115f812c9686130 (git) Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 8fa5655da368d0306c03e9dc9cda8ae2a7840926 (git)
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (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/gpu/drm/amd/amdkfd/kfd_svm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c8a8d350a273c005a48c64c4519d21b2a51c5ceb",
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              "version": "2a909ae718715b3bac75d945e38dc0a5e4a0f1ba",
              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
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              "lessThan": "96ac562a9ea3020981f536384711190841c81aa8",
              "status": "affected",
              "version": "2a909ae718715b3bac75d945e38dc0a5e4a0f1ba",
              "versionType": "git"
            },
            {
              "lessThan": "e33a3bd5cb8d0cf1557dee014115f812c9686130",
              "status": "affected",
              "version": "2a909ae718715b3bac75d945e38dc0a5e4a0f1ba",
              "versionType": "git"
            },
            {
              "lessThan": "8fa5655da368d0306c03e9dc9cda8ae2a7840926",
              "status": "affected",
              "version": "2a909ae718715b3bac75d945e38dc0a5e4a0f1ba",
              "versionType": "git"
            }
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_svm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "5.18",
                  "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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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix list_del corruption in kfd_criu_resume_svm\n\nThe cleanup tail of kfd_criu_resume_svm() walks\nsvms-\u003ecriu_svm_metadata_list and kfree()s each struct criu_svm_metadata\nwithout removing it from the list. The list head is left pointing at\nfreed kmalloc-96 objects.\n\nA second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty()\nreads the dangling -\u003enext (use-after-free), the loop walks freed entries,\nand each is kfree()\u0027d again (double-free). This is reachable by an\nunprivileged render-group user via /dev/kfd with no capabilities required.\n\nAdd list_del() before the kfree() so the list is properly emptied. The\nlist_for_each_entry_safe() iterator already caches the next pointer, so\nunlinking during the walk is safe.\n\n(cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only via the local AMDKFD_IOC_CRIU_OP ioctl on /dev/kfd (unlocked_ioctl -\u003e kfd_ioctl_criu -\u003e criu_resume -\u003e kfd_criu_resume_svm); there is no network, adjacent-radio, or physical-device entry path.\nAC:L - An attacker who can open /dev/kfd controls the full CRIU restore/resume ioctl sequence and can deterministically trigger the bug by issuing KFD_CRIU_OP_RESUME twice after restore populates criu_svm_metadata_list; no uncontrollable race or rare layout is required.\nPR:L - The fix commit and ioctl path show exploitation by a local render-group user opening /dev/kfd; CAP_CHECKPOINT_RESTORE/SYS_ADMIN gates CRIU ioctls but are obtainable in a user namespace, matching basic local user privilege rather than init-namespace root only.\nUI:N - Exploitation requires only the attacker\u0027s own ioctl calls to /dev/kfd after CRIU restore; no victim click, mount, file open, or other interactive action is needed.\nS:U - Corruption is confined to kernel heap list metadata in amdkfd for the calling KFD process context; impact stays within the kernel security authority and does not cross a VM, IOMMU, or hypervisor boundary.\nC:H - After the first resume, list_empty() and list iteration dereference freed kmalloc-96 criu_svm_metadata objects (use-after-free reads of -\u003enext/list pointers), enabling attacker-influenced heap disclosure beyond a bounded leak.\nI:H - A second resume walks the corrupted list and kfree()s the same objects again (double-free on kmalloc-96 slabs), a standard exploitable kernel heap primitive for arbitrary memory corruption and potential privilege escalation.\nA:H - The use-after-free and double-free reliably corrupt kernel heap state and commonly cause BUG/KASAN faults, oops, or panic when the dangling list is traversed again, producing system-wide denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:44:18.630Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c8a8d350a273c005a48c64c4519d21b2a51c5ceb"
        },
        {
          "url": "https://git.kernel.org/stable/c/506e635aed05dbdeef11e3c59f6e42980cda5b6d"
        },
        {
          "url": "https://git.kernel.org/stable/c/838b57b3e7ce8cce0fda56d0861add3d464dd6c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/96ac562a9ea3020981f536384711190841c81aa8"
        },
        {
          "url": "https://git.kernel.org/stable/c/e33a3bd5cb8d0cf1557dee014115f812c9686130"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fa5655da368d0306c03e9dc9cda8ae2a7840926"
        }
      ],
      "title": "drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72449",
    "datePublished": "2026-08-15T05:56:58.313Z",
    "dateReserved": "2026-08-09T03:40:39.931Z",
    "dateUpdated": "2026-08-17T05:44:18.630Z",
    "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.

Detection rules are retrieved from Rulezet.

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-XGPC-Q5WR-Q4V5

CVE-2026-72449 (GCVE-0-2026-72449)

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Sightings

Nomenclature