VULNERABILITY INTELLIGENCE

CVE-2026-58093

CVSS score7 HIGH
EPSS probability0.10%
CISA KEVNot currently listed
Published2026-08-26
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • secteam@freebsd.org: CWE-362

Primary references