Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ax25: fix use-after-free bugs caused by ax25_ds_del_timer When the ax25 device is detaching, the ax25_dev_device_down() calls ax25_ds_del_timer() to cleanup the slave_timer. When the timer handler is running, the ax25_ds_del_timer() that calls del_timer() in it will return directly. As a result, the use-after-free bugs could happen, one of the scenarios is shown below: (Thread 1) | (Thread 2) | ax25_ds_timeout() ax25_dev_device_down() | ax25_ds_del_timer() | del_timer() | ax25_dev_put() //FREE | | ax25_dev-> //USE In order to mitigate bugs, when the device is detaching, use timer_shutdown_sync() to stop the timer.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 28f2d36ac52225a13e020c2589833f1816a0cfc6; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 74204bf9050f7627aead9875fe4e07ba125cb19b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c6a368f9c7af4c14b14d390c2543af8001c9bdb9; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before fd819ad3ecf6f3c232a06b27423ce9ed8c20da89 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.26 through 6.6.*; unaffected 6.8.5 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/28f2d36ac52225a13e020c2589833f1816a0cfc6
- https://git.kernel.org/stable/c/8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf
- https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b
- https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9
- https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.