Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tty: fix saved termios reset race Resetting saved termios state on device registration is needed where a minor number can be reused for an entirely different device and where the old settings may prevent the port from even being opened (e.g. when CLOCAL is not set). Not all TTY drivers guarantee that the minor number is no longer in use when registering devices however, something which can lead to a use-after-free when closing a TTY (and saving its termios) races with re-registration. Add a new TTY_DRIVER_RESET_SAVED_TERMIOS flag to request that any saved termios state is reset on registration and only set it for drivers that make sure that the minor number is no longer in use.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 93857edd9829e144acb6c7e72d593f6e01aead66 before 6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6; affected 93857edd9829e144acb6c7e72d593f6e01aead66 before 1572d86bcf0bcb848d20fc5e5de7ed6963034c2b; affected 93857edd9829e144acb6c7e72d593f6e01aead66 before 08bf919f041af9de372428bb0c938157ea144164; affected 93857edd9829e144acb6c7e72d593f6e01aead66 before dcaf0251f847a45861e94c6617024a9455687d2f; affected 93857edd9829e144acb6c7e72d593f6e01aead66 before 8df07fe93573e9e548d6645273e9bcb6eb74059e |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; 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/6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6
- https://git.kernel.org/stable/c/1572d86bcf0bcb848d20fc5e5de7ed6963034c2b
- https://git.kernel.org/stable/c/08bf919f041af9de372428bb0c938157ea144164
- https://git.kernel.org/stable/c/dcaf0251f847a45861e94c6617024a9455687d2f
- https://git.kernel.org/stable/c/8df07fe93573e9e548d6645273e9bcb6eb74059e