CVE-2026-58093

CVE-2026-58093 is a use-after-free vulnerability in the FreeBSD kernel tty subsystem , specifically in the TIOCSCTTY ioctl handler. The handler drops the tty lock to acquire the process tree lock but fails to revalidate the terminal's state upon reacquiring the tty lock, allowing it to link a con...

CVE-2026-58093 Kernel use-after-free via tty ioctls

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...

FreeBSD-SA-26:62.tty

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:62.tty Security Advisory The FreeBSD Project Topic: Kernel use-after-free via tty ioctls Category: core Module: tty Announced: 2026-08-25 Credits: tsune of...

NetBSD Security Advisory 2002-007: Repeated TIOCSCTTY ioctl can corrupt session hold counts

-----BEGIN PGP SIGNED MESSAGE----- NetBSD Security Advisory 2002-007 ================================= Topic: Repeated TIOCSCTTY ioctl can corrupt session hold counts Version: NetBSD-current: source prior to July 21, 2002 NetBSD-1.6 beta: source prior to July 23, 2002 NetBSD-1.5.: source prior to...