Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 16032c980d8f71642fcdc99309c571df3fcf3328; affected a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 34d4f67472ef7a744970b772a8565ddc727788e2; affected a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 7021acc84c2e0add77a1a33152e3a1e428fdbfdb; affected a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 6388409b711eb91b14fa075a4d861ccc4df1cfe7; affected a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 56964f6a31238fb41d5830bb42520c5b10ff7d8f |
| Linux / Linux | affected 2.6.33; unaffected 0 before 2.6.33; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
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