{"id":"CVE-2026-58100","title":"kqueue_fork_copy_knote() indexed into the child's file descriptor table using a knote's file descriptor number without a bounds check","summary":"kqueue_fork_copy_knote() indexed into the child's file descriptor table using a knote's file descriptor number without a bounds check.  Because the child's table is copied before knotes are transferred, a concurrent thread in the parent …","severity":"high","cwe":["CWE-125","CWE-362"],"vendor":"FreeBSD","product":"FreeBSD","affected":["FreeBSD >= 15.1-RELEASE < p4"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:17:41.437","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-58100","references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:65.kqueue.asc","label":"secteam@freebsd.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T06:56:27.294Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T03:56:56.154892Z"},"epss":0.001,"epssPercentile":0.00834,"cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"adp","slug":"CVE-2026-58100","body":"## Overview\n\nkqueue_fork_copy_knote() indexed into the child's file descriptor table using a knote's file descriptor number without a bounds check.  Because the child's table is copied before knotes are transferred, a concurrent thread in the parent could grow the parent's table and register knotes with file descriptor numbers beyond the end of the child's table, causing an out-of-bounds read.\n\nAn unprivileged local user may be able to exploit these races to escalate privileges.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224963,"id":"CVE-2026-58100","ts":1792420239373,"field":"cvss","old":null,"new":"7"},{"seq":224962,"id":"CVE-2026-58100","ts":1792420239373,"field":"severity","old":"none","new":"high"}]}