Description
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 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
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 28f2d36ac52225a13e020c2589833f1816a0cfc6affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8a912ef5b7c5d14fb41b9a7935d1df5bb87058bfaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 74204bf9050f7627aead9875fe4e07ba125cb19baffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < c6a368f9c7af4c14b14d390c2543af8001c9bdb9affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < fd819ad3ecf6f3c232a06b27423ce9ed8c20da89affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.26 to ≤ 6.6.*unaffected6.8.5 to ≤ 6.8.*unaffected6.9 to ≤ *unaffected
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 ↗