net: kcm: Fix race condition in kcm_unattach()

{
  "id": "66998e0010b6cbec08c510f2c5f768bffda74ffbf159544339bfccd7bc5d2979",
  "url": "https://osv.dev/vulnerability/CVE-2025-38717",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: kcm: Fix race condition in kcm_unattach()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: kcm: Fix race condition in kcm_unattach() syzbot found a race condition when kcm_unattach(psock) and kcm_release(kcm) are executed at the same time. kcm_unattach() is missing a check of the flag kcm->tx_stopped before calling queue_work(). If the kcm has a reserved psock, kcm_unattach() might get executed between cancel_work_sync() and unreserve_psock() in kcm_release(), requeuing kcm->tx_work right before kcm gets freed in kcm_done(). Remove kcm->tx_stopped and replace it by the less error-prone disable_work_sync().",
    "evidence": "osv:CVE-2025-38717",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.43",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.16.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-38717",
      "aliases": [
        "CVE-2025-38717"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3"
                },
                {
                  "fixed": "c0bffbc92a1ca3960fb9cdb8e9f75a68468eb308"
                },
                {
                  "fixed": "7275dc3bb8f91b23125ff3f47b6529935cf46152"
                },
                {
                  "fixed": "798733ee5d5788b12e8a52db1519abc17e826f69"
                },
                {
                  "fixed": "52565a935213cd6a8662ddb8efe5b4219343a25d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38717.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.6.0"
                },
                {
                  "fixed": "6.12.43"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.15.11"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.16.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38717.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.348814544Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/52565a935213cd6a8662ddb8efe5b4219343a25d",
        "https://git.kernel.org/stable/c/7275dc3bb8f91b23125ff3f47b6529935cf46152",
        "https://git.kernel.org/stable/c/798733ee5d5788b12e8a52db1519abc17e826f69",
        "https://git.kernel.org/stable/c/c0bffbc92a1ca3960fb9cdb8e9f75a68468eb308",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38717.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38717",
        "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/2025/38xxx/CVE-2025-38717.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38717",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505853,
  "published_at": "2025-09-04T15:33:11.686+00:00"
}