CVE-2026-58100

CVE-2026-58100 · Memory safety bugs in kqueue copy-on-fork implementation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.0 · High · EPSS 0.1%

Published

2026-10-15T06:31:27.858Z

Updated

2026-10-19T14:11:08.268Z

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