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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-58093

Kernel use-after-free via tty ioctls

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Status
Published
Published
Updated
Assigning organization
freebsd

Description

The TIOCSCTTY ioctl handler drops the tty lock in order to acquire the process tree lock. After reacquiring the tty lock, the handler did not revalidate the state of the terminal, and could proceed to link a terminal that was concurrently being destroyed to the calling process' session. An unprivileged local user can exploit this race condition to escalate privileges.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FreeBSD FreeBSD

Default version status: unknown

  • 15.1-RELEASE to < p3affected
  • 15.0-RELEASE to < p13affected
  • 14.4-RELEASE to < p9affected

References