{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58099", "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "state": "PUBLISHED", "assignerShortName": "freebsd", "dateReserved": "2026-06-29T01:40:17.499Z", "datePublished": "2026-10-15T06:31:18.042Z", "dateUpdated": "2026-10-15T06:31:18.042Z"}, "containers": {"cna": {"datePublic": "2026-09-29T20:30:00.000Z", "title": "Memory safety bugs in kqueue copy-on-fork implementation", "references": [{"tags": ["vendor-advisory"], "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:65.kqueue.asc"}], "affected": [{"defaultStatus": "unknown", "modules": ["kqueue"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"status": "affected", "versionType": "release", "version": "15.1-RELEASE", "lessThan": "p4"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Reo Shiseki"}, {"lang": "en", "type": "finder", "value": "Mark Johnston"}], "descriptions": [{"lang": "en", "value": "When copying knotes from a parent kqueue to a child, the copy code did not correctly exclude marker knotes (used internally to track list traversal position) before marking them as in-flux and releasing the kqueue lock. If another thread freed a marker while the lock was dropped, the subsequent in-flux decrement operated on freed memory.\n\nAn unprivileged local user may be able to exploit these races to escalate privileges."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-362", "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "lang": "en", "type": "CWE"}, {"cweId": "CWE-416", "description": "CWE-416: Use After Free", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109", "shortName": "freebsd", "dateUpdated": "2026-10-15T06:31:18.042Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "modules": ["kqueue"], "product": "FreeBSD", "vendor": "FreeBSD", "versions": [{"lessThan": "p4", "status": "affected", "version": "15.1-RELEASE", "versionType": "release"}]}], "source": "secteam@freebsd.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "When copying knotes from a parent kqueue to a child, the copy code did not correctly exclude marker knotes (used internally to track list traversal position) before marking them as in-flux and releasing the kqueue lock. If another thread freed a marker while the lock was dropped, the subsequent in-flux decrement operated on freed memory.\n\nAn unprivileged local user may be able to exploit these races to escalate privileges."}], "id": "CVE-2026-58099", "lastModified": "2026-10-15T16:17:41.437", "metrics": {}, "published": "2026-10-15T07:18:02.373", "references": [{"source": "secteam@freebsd.org", "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:65.kqueue.asc"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}, {"lang": "en", "value": "CWE-416"}], "source": "secteam@freebsd.org", "type": "Secondary"}]}

{}

{"created": "2026-10-15T12:00:18.752252+00:00", "updated": "2026-10-15T12:00:18.752278+00:00", "vendors": []}