lsm: hold cred_guard_mutex for lsm_set_self_attr()

{
  "id": "17e4d0316bbc66a1ffb7b7bbc48ceb9a5077e574d7ce6925fc6634e7da885903",
  "url": "https://osv.dev/vulnerability/CVE-2026-64111",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "lsm: hold cred_guard_mutex for lsm_set_self_attr()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: lsm: hold cred_guard_mutex for lsm_set_self_attr() Just as proc_pid_attr_write() already does before calling the LSM hook. This only matters for SELinux and AppArmor which check whether the process is being ptraced and if so, whether to allow the transition.",
    "evidence": "osv:CVE-2026-64111",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.92",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.34",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-64111",
      "aliases": [
        "CVE-2026-64111"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a04a1198088a1378d0389c250cc684f649bcc91e"
                },
                {
                  "fixed": "82d3acee88593e3d9e71cad4b7d6b3cf70de9d07"
                },
                {
                  "fixed": "5b906f31e977286888a9e31282589b545b249139"
                },
                {
                  "fixed": "a010cadaf5727b8417f62fe9021fcef14a5f9b51"
                },
                {
                  "fixed": "4a9b16541ad3faf8bccb398532bf3f8b6bbf1188"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64111.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.8.0"
                },
                {
                  "fixed": "6.12.92"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.34"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64111.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.821785155Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/4a9b16541ad3faf8bccb398532bf3f8b6bbf1188",
        "https://git.kernel.org/stable/c/5b906f31e977286888a9e31282589b545b249139",
        "https://git.kernel.org/stable/c/82d3acee88593e3d9e71cad4b7d6b3cf70de9d07",
        "https://git.kernel.org/stable/c/a010cadaf5727b8417f62fe9021fcef14a5f9b51",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64111.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64111",
        "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/2026/64xxx/CVE-2026-64111.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64111",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506938,
  "published_at": "2026-07-19T15:40:13.007+00:00"
}