Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 to < 16032c980d8f71642fcdc99309c571df3fcf3328affecteda9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 to < 34d4f67472ef7a744970b772a8565ddc727788e2affecteda9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 to < 7021acc84c2e0add77a1a33152e3a1e428fdbfdbaffecteda9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 to < 6388409b711eb91b14fa075a4d861ccc4df1cfe7affecteda9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 to < 56964f6a31238fb41d5830bb42520c5b10ff7d8faffected
Linux Linux
Default version status: affected
2.6.33affected0 to < 2.6.33unaffected6.6.160 to ≤ 6.6.*unaffected6.12.113 to ≤ 6.12.*unaffected6.18.56 to ≤ 6.18.*unaffected7.2.10 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/16032c980d8f71642fcdc99309c571df3fcf3328 ↗
- https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2 ↗
- https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb ↗
- https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7 ↗
- https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f ↗