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. An unprivileged local user may be able to exploit these races to escalate privileges.
History

Mon, 19 Oct 2026 21:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.1:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.1:p3:*:*:*:*:*:*

Mon, 19 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Sat, 17 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Freebsd
Freebsd freebsd
Vendors & Products Freebsd
Freebsd freebsd

Fri, 16 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 15 Oct 2026 06:45:00 +0000

Type Values Removed Values Added
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. An unprivileged local user may be able to exploit these races to escalate privileges.
Title Memory safety bugs in kqueue copy-on-fork implementation
Weaknesses CWE-125
CWE-362
References

cve-icon MITRE

Status: PUBLISHED

Assigner: freebsd

Published: 2026-10-15T06:31:27.858Z

Updated: 2026-10-19T14:11:08.268Z

Reserved: 2026-06-29T01:40:17.499Z

Link: CVE-2026-58100

cve-icon Vulnrichment

Updated: 2026-10-16T14:17:41.227Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-15T07:18:02.490

Modified: 2026-10-19T21:01:55.713

Link: CVE-2026-58100

cve-icon Redhat

No data.