FreeBSD-SA-26:64.sysvsem Security Advisory

{
  "id": "bfb50b5ebb3620ccd48a1635bec39cbbb64145c1fa978eeb9f52814690978e16",
  "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-26:64.sysvsem.asc",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "FreeBSD-SA-26:64.sysvsem Security Advisory",
    "summary": "A heap out-of-bounds access in semop(2) may allow an unprivileged local user to escalate privileges. FreeBSD corrected the issue in the listed stable and release branches; affected systems should be upgraded and rebooted.",
    "evidence": "Heap out-of-bounds access in semop(2)",
    "products": [
      {
        "name": {
          "value": "FreeBSD",
          "evidence": "All supported versions of FreeBSD."
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "15.1-RELEASE-p4",
            "evidence": "2026-09-29 16:00:02 UTC (releng/15.1, 15.1-RELEASE-p4)"
          },
          {
            "value": "15.0-RELEASE-p14",
            "evidence": "2026-09-29 15:59:12 UTC (releng/15.0, 15.0-RELEASE-p14)"
          },
          {
            "value": "14.5-RELEASE-p1",
            "evidence": "2026-09-29 16:09:04 UTC (releng/14.5, 14.5-RELEASE-p1)"
          },
          {
            "value": "14.4-RELEASE-p10",
            "evidence": "2026-09-29 15:57:26 UTC (releng/14.4, 14.4-RELEASE-p10)"
          }
        ],
        "affected_versions": [
          {
            "value": "All supported versions of FreeBSD.",
            "evidence": "Affects: All supported versions of FreeBSD."
          }
        ]
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-58098",
        "evidence": "CVE Name: CVE-2026-58098"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-freebsd-security",
  "document_id": 23627,
  "published_at": "2026-09-29T00:00:00+00:00"
}