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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: freebsd

Published:

Updated: 2026-10-16T14:18:49.468Z

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 : Undergoing Analysis

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

Modified: 2026-10-16T15:17:32.873

Link: CVE-2026-58100

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T19:00:13Z

Weaknesses