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.
An unprivileged local user may be able to exploit these races to escalate privileges.
Metrics
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Fixes
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Workaround
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References
History
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 |
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| References |
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MITRE
Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-10-15T06:31:27.858Z
Reserved: 2026-06-29T01:40:17.499Z
Link: CVE-2026-58100
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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