{"id":"CVE-2026-58100","aliases":["EUVD-2026-101857","GHSA-cvhg-28x6-2vj7"],"status":"published","title":"Memory safety bugs in kqueue copy-on-fork implementation","description":"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 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.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.001,"percentile":0.00843,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125","CWE-362"],"published":"2026-10-15T06:31:27Z","modified":"2026-10-19T21:01:55Z","products":[{"vendor":"freebsd","product":"freebsd"}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:65.kqueue.asc","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58100"},{"url":"https://github.com/advisories/GHSA-cvhg-28x6-2vj7"}],"sources":{"cve":[{"id":"CVE-2026-58100","title":"Memory safety bugs in kqueue copy-on-fork implementation","description":"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 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.","status":"published","published":"2026-10-15T06:31:27.858Z","modified":"2026-10-19T14:11:08.268Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-362","CWE-125"],"updated_at":"2026-11-02T13:47:28.691429Z"}],"euvd":[{"id":"EUVD-2026-101857","description":"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 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.","status":"published","published":"2026-10-15T06:31:27Z","modified":"2026-10-19T14:11:08Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:59:51.186399Z"}],"ghsa":[{"id":"GHSA-cvhg-28x6-2vj7","title":"kqueue_fork_copy_knote() indexed into the child's file descriptor table using a knote's file...","description":"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 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.","status":"published","published":"2026-10-15T09:30:33Z","modified":"2026-10-19T15:32:29Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:13:57.032902Z"}],"nvd":[{"id":"CVE-2026-58100","description":"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 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.","status":"published","published":"2026-10-15T07:18:02.49Z","modified":"2026-10-19T21:01:55.713Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-125","CWE-362"],"updated_at":"2026-11-02T14:12:59.328869Z"}]}}