Vulnerability-Lookup

GHSA-257H-4Q39-V2V3

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-28 09:31

Details

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

PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability

dwc_pcie_rasdes_debugfs_init() returns success when the controller has no RAS DES capability, leaving pci->debugfs->rasdes_info unset. The common debugfs teardown path still calls dwc_pcie_rasdes_debugfs_deinit(), which dereferences rasdes_info unconditionally.

Return early when no RAS DES state was allocated. In that case no RAS DES mutex was initialized, so there is nothing to destroy.

[mani: reworded subject]

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80621"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability\n\ndwc_pcie_rasdes_debugfs_init() returns success when the controller has no\nRAS DES capability, leaving pci-\u003edebugfs-\u003erasdes_info unset. The common\ndebugfs teardown path still calls dwc_pcie_rasdes_debugfs_deinit(), which\ndereferences rasdes_info unconditionally.\n\nReturn early when no RAS DES state was allocated. In that case no RAS DES\nmutex was initialized, so there is nothing to destroy.\n\n[mani: reworded subject]",
  "id": "GHSA-257h-4q39-v2v3",
  "modified": "2026-08-28T09:31:47Z",
  "published": "2026-08-28T09:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80621"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26b67fa10ef84ea667942491b50e6261a45f098d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/514b84b1bf30f75f32c2fa66734dc1a177abb73e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/855870e8c59b97fd424e8fa3543c9e289bb48fac"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-80621 (GCVE-0-2026-80621)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-28 06:48

Title

PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability dwc_pcie_rasdes_debugfs_init() returns success when the controller has no RAS DES capability, leaving pci->debugfs->rasdes_info unset. The common debugfs teardown path still calls dwc_pcie_rasdes_debugfs_deinit(), which dereferences rasdes_info unconditionally. Return early when no RAS DES state was allocated. In that case no RAS DES mutex was initialized, so there is nothing to destroy. [mani: reworded subject]

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/514b84b1bf30f75f3…
https://git.kernel.org/stable/c/855870e8c59b97fd4…
https://git.kernel.org/stable/c/26b67fa10ef84ea66…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4fbfa17f9a075593281034f566ca79cbf4930c82 , < 514b84b1bf30f75f32c2fa66734dc1a177abb73e (git) Affected: 4fbfa17f9a075593281034f566ca79cbf4930c82 , < 855870e8c59b97fd424e8fa3543c9e289bb48fac (git) Affected: 4fbfa17f9a075593281034f566ca79cbf4930c82 , < 26b67fa10ef84ea667942491b50e6261a45f098d (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (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/pci/controller/dwc/pcie-designware-debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "514b84b1bf30f75f32c2fa66734dc1a177abb73e",
              "status": "affected",
              "version": "4fbfa17f9a075593281034f566ca79cbf4930c82",
              "versionType": "git"
            },
            {
              "lessThan": "855870e8c59b97fd424e8fa3543c9e289bb48fac",
              "status": "affected",
              "version": "4fbfa17f9a075593281034f566ca79cbf4930c82",
              "versionType": "git"
            },
            {
              "lessThan": "26b67fa10ef84ea667942491b50e6261a45f098d",
              "status": "affected",
              "version": "4fbfa17f9a075593281034f566ca79cbf4930c82",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/controller/dwc/pcie-designware-debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "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": "6.18.40",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability\n\ndwc_pcie_rasdes_debugfs_init() returns success when the controller has no\nRAS DES capability, leaving pci-\u003edebugfs-\u003erasdes_info unset. The common\ndebugfs teardown path still calls dwc_pcie_rasdes_debugfs_deinit(), which\ndereferences rasdes_info unconditionally.\n\nReturn early when no RAS DES state was allocated. In that case no RAS DES\nmutex was initialized, so there is nothing to destroy.\n\n[mani: reworded subject]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T06:48:41.081Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/514b84b1bf30f75f32c2fa66734dc1a177abb73e"
        },
        {
          "url": "https://git.kernel.org/stable/c/855870e8c59b97fd424e8fa3543c9e289bb48fac"
        },
        {
          "url": "https://git.kernel.org/stable/c/26b67fa10ef84ea667942491b50e6261a45f098d"
        }
      ],
      "title": "PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80621",
    "datePublished": "2026-08-28T06:48:41.081Z",
    "dateReserved": "2026-08-26T14:34:25.774Z",
    "dateUpdated": "2026-08-28T06:48:41.081Z",
    "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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-257H-4Q39-V2V3

CVE-2026-80621 (GCVE-0-2026-80621)

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