CVE-2026-58099High· 7.0▾ TwilightWhen 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 threa…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the CISA ADP record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.1%
— → 7
none → high
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-58100High· 7.0kqueue_fork_copy_knote() indexed into the child's file descriptor table using a knote's file descriptor number without a bounds check
CVE-2026-58093High· 7.0The TIOCSCTTY ioctl handler drops the tty lock in order to acquire the process tree lock
CVE-2026-101309High· 7.0The xHCI (USB 3) device model did not validate or save the event ring size provided by the guest
CVE-2026-101310High· 7.0The HDA audio device model did not check for zero-length Buffer Descriptor List (BDL) entries when starting a stream
CVE-2026-101311High· 7.0The framebuffer device model's maximum resolution constants were duplicated between the framebuffer and RFB modules and had gotten out of sync
CVE-2026-58091High· 7.8The implementation of this ioctl attempts to acquire locks on all channels in a sync group