FreeBSD-SA-26:57.unix Security Advisory

{
  "id": "aff3d729aeb0bbb0973cb5be334039a876e93af5e039f32aad06994577793dfc",
  "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-26:57.unix.asc",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "FreeBSD-SA-26:57.unix Security Advisory",
    "summary": "A use-after-free in FreeBSD unix SOCK_STREAM message handling could let an unprivileged local user escalate privileges. The advisory provides corrected FreeBSD 15.x release versions and update instructions.",
    "evidence": "Topic: Use-after-free in unix SOCK_STREAM message handling",
    "products": [
      {
        "name": {
          "value": "FreeBSD",
          "evidence": "Affects: FreeBSD 15.0 and later"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "15.1-RELEASE-p3",
            "evidence": "2026-08-25 16:01:22 UTC (releng/15.1, 15.1-RELEASE-p3)"
          },
          {
            "value": "15.0-RELEASE-p13",
            "evidence": "2026-08-25 16:01:01 UTC (releng/15.0, 15.0-RELEASE-p13)"
          }
        ],
        "affected_versions": [
          {
            "value": "FreeBSD 15.0 and later",
            "evidence": "Affects: FreeBSD 15.0 and later"
          }
        ]
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-58090",
        "evidence": "CVE Name: CVE-2026-58090"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-freebsd-security",
  "document_id": 23636,
  "published_at": "2026-08-25T00:00:00+00:00"
}