Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tty: clear cdev pointer after cdev_add() failure tty_cdev_add() drops the cdev reference when cdev_add() fails, but leaves driver->cdevs[index] pointing to freed memory. tty_unregister_device() later passes that stale pointer to cdev_del(), causing a use-after-free. Clear the slot after dropping the reference.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before fb1de260033c215dba438973d82b48562bdc86bb; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before e9e64dd02fd68776afda00777591eca0c3984285; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before 33a44333a9dfda044b0e233399b12ead7f8a90ae; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before d331c63570af61ef7aaf516b64a8d6f47518a3a4; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before a83fcddf3c75d004f12aa13555bb73da19fb75a9; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before 4f6bd79bb7e55095f09bec9b4eb6c09df1306116; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before 5c5a795bf6248fe96f96dd9fd79d66bbb4a92077; affected c1a752ba2d6b8a52879c7ab637cff38359ea9827 before 6645856f0df3aeecd45519cb611415b4b89c2223 |
| Linux / Linux | affected 4.3; unaffected 0 before 4.3; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb
- https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285
- https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae
- https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4
- https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9
- https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116
- https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077
- https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223