NFSD: Handle layout stid in nfsd4_drop_revoked_stid()

{
  "id": "e3165924cf0f25f404fac2e75c49b5853b33d94f37e0b663752a3fecc3aed2f9",
  "url": "https://osv.dev/vulnerability/CVE-2026-74316",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "NFSD: Handle layout stid in nfsd4_drop_revoked_stid()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: NFSD: Handle layout stid in nfsd4_drop_revoked_stid() nfsd4_drop_revoked_stid() has no SC_TYPE_LAYOUT case, so when a client sends FREE_STATEID for an admin-revoked layout stid, the default branch releases cl_lock and returns without unhashing or releasing the stid. The stid remains in the IDR and on the per-client list until the client is destroyed. Remove the layout stid from the per-client list and call nfs4_put_stid() to drop the creation reference. When the refcount reaches zero, nfsd4_free_layout_stateid() handles the remaining cleanup: cancelling the fence worker, removing from the per-file list, and freeing the slab object.",
    "evidence": "osv:CVE-2026-74316",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.97",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-74316",
      "aliases": [
        "CVE-2026-74316"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1e33e1414bec54a4feafa9e67e2617031be0afe2"
                },
                {
                  "fixed": "7ed62f7040ee182cf7dea5798f9e114235b31dae"
                },
                {
                  "fixed": "da6f86ff4f2dd490bea52419a49e19680efd5847"
                },
                {
                  "fixed": "8024028ef91616cf91cc669f2446a0406bc0ba19"
                },
                {
                  "fixed": "86b9898920a6d02b4149f4fef9efd77b8aa3b9ca"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74316.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.9.0"
                },
                {
                  "fixed": "6.12.97"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "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-2026-74316.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.465730073Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/7ed62f7040ee182cf7dea5798f9e114235b31dae",
        "https://git.kernel.org/stable/c/8024028ef91616cf91cc669f2446a0406bc0ba19",
        "https://git.kernel.org/stable/c/86b9898920a6d02b4149f4fef9efd77b8aa3b9ca",
        "https://git.kernel.org/stable/c/da6f86ff4f2dd490bea52419a49e19680efd5847",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74316.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74316",
        "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/2026/74xxx/CVE-2026-74316.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74316",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497377,
  "published_at": "2026-08-15T05:58:14.165+00:00"
}