UNKNOWN NVD
CVE-2026-98753
In the Linux kernel, the following vulnerability has been resolved: tty: tty_port: restore TTY_IO_ERROR on activation failure Make sure to restore the TTY_IO_
In the Linux kernel, the following vulnerability has been resolved:
tty: tty_port: restore TTY_IO_ERROR on activation failure
Make sure to restore the TTY_IO_ERROR flag if activation fails to
prevent I/O attempts on a port that is gone or powered down.
This specifically avoids issues like kernel panic due to unclocked
accesses or NULL-pointer dereferences when accessing powered down or
deregistered ports when a TTY ioctl races with hangup and open.
Note that the flag is set again in tty_port_close() but not restoring it
on activation failure leaves a window where drivers fail to handle the
ioctl-hangup race.
References
- https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2
- https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f
- https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7
- https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb
This unknown severity vulnerability was published on 2026-10-18 via NVD.
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