CVE-2026-98753

UNKNOWN 0.0

tty: tty_port: restore TTY_IO_ERROR on activation failure

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Oct 18, 2026

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Affected Versions

Linux / Linux

a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 34d4f67472ef7a744970b772a8565ddc727788e2 a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 7021acc84c2e0add77a1a33152e3a1e428fdbfdb a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 6388409b711eb91b14fa075a4d861ccc4df1cfe7 a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 56964f6a31238fb41d5830bb42520c5b10ff7d8f

Linux / Linux

2.6.33

References

NVD ↗ CVE.org ↗ EPSS Data ↗

git.kernel.org: https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2 git.kernel.org: https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb git.kernel.org: https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7 git.kernel.org: https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f