CVE-2026-98753None▾ SunlitIn 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…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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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.
Linux >= a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 34d4f67472ef7a744970b772a8565ddc727788e2Linux >= a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 7021acc84c2e0add77a1a33152e3a1e428fdbfdbLinux >= a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 6388409b711eb91b14fa075a4d861ccc4df1cfe7Linux >= a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 < 56964f6a31238fb41d5830bb42520c5b10ff7d8fLinux 2.6.33Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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