Live › vulnerability › CVE-2026-98751
Go to dashboardThe Linux kernel's tty break ioctls (TCSBRK and TCSBRKP) can race with a terminal hangup and call into a tty driver for a device that is already gone or powered down. The fix aborts break signalling on hangup so the driver is not called back after a user-controlled timeout, possibly after the tty has been reopened.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
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In the Linux kernel, the following vulnerability has been resolved:
tty: abort break signalling on hangup
The break ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down.
Drivers must handle this race, but TCSBRK and TCSBRKP should still be aborted to avoid calling back into the driver after a user-controlled timeout (possibly even after the tty has been reopened).
Note that drivers should disable any break state on shutdown so just return on hangup (calling break_ctl() again is racy and will most likely fail for drivers handling the race).
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