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CVE-2026-58099

7.0 high SSVC exploitation: none Analyzed
NVD · CVE.org

When copying knotes from a parent kqueue to a child, the copy code did not correctly exclude marker knotes (used internally to track list traversal position) before marking them as in-flux and releasing the kqueue lock. If another thread freed a marker while the lock was dropped, the subsequent in-flux decrement operated on freed memory. An unprivileged local user may be able to exploit these races to escalate privileges.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 6

  1. Cpes+4 CPE criteria (now 4)NVD modified 2026-10-19 21:02
  2. StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-19 21:02
  3. CVSS7.0 (v3.1, CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)NVD modified 2026-10-19 15:17
  4. StatusAwaiting Analysis → Undergoing AnalysisNVD modified 2026-10-16 04:18
  5. StatusReceived → Awaiting AnalysisNVD modified 2026-10-15 16:17
  6. First seenunscoredNVD modified 2026-10-15 07:18

Affected (CPE criteria) 4

  • 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:*:*:*:*:*:*

References 1