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

Type: advisorySources: OSV

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]

Products
Kernel
Affected versions
Not specified
Fixed versions
6.18.40, 7.1.5
CVEs
CVE-2026-80621
Confirmed fixed CVEs
Not specified
Updated in this feed
8 Nov 2026, 02:33 UTC · Revision 1

Source evidence

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

core-osv · Original source

Published 28 Aug 2026, 06:48 UTC

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]

osv:CVE-2026-80621

Kernel

Fixed versions: 6.18.40, 7.1.5

Complete source record
{
  "id": "a3f73cfc0750c62a4c3b1e1686be23e5e8d94af9a2a1e7cd5c84ea9fa9d5af70",
  "url": "https://osv.dev/vulnerability/CVE-2026-80621",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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]",
    "evidence": "osv:CVE-2026-80621",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-80621",
      "aliases": [
        "CVE-2026-80621"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4fbfa17f9a075593281034f566ca79cbf4930c82"
                },
                {
                  "fixed": "514b84b1bf30f75f32c2fa66734dc1a177abb73e"
                },
                {
                  "fixed": "855870e8c59b97fd424e8fa3543c9e289bb48fac"
                },
                {
                  "fixed": "26b67fa10ef84ea667942491b50e6261a45f098d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80621.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.15.0"
                },
                {
                  "fixed": "6.18.40"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80621.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.793055051Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/26b67fa10ef84ea667942491b50e6261a45f098d",
        "https://git.kernel.org/stable/c/514b84b1bf30f75f32c2fa66734dc1a177abb73e",
        "https://git.kernel.org/stable/c/855870e8c59b97fd424e8fa3543c9e289bb48fac",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80621.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80621",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80621.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80621",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521823,
  "published_at": "2026-08-28T06:48:41.081+00:00"
}