CVSS 7.8 · High EPSS 0,13%
Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix use-after-free in lbs_free_adapter() The lbs_free_adapter() function uses timer_delete() (non-synchronous) for both command_timer and tx_lockup_timer before the structure is freed. This is incorrect because timer_delete() does not wait for any running timer callback to complete. If a timer callback is executing when lbs_free_adapter() is called, the callback will access freed memory since lbs_cfg_free() frees the containing structure immediately after lbs_free_adapter() returns. Both timer callbacks (lbs_cmd_timeout_handler and lbs_tx_lockup_handler) access priv->driver_lock, priv->cur_cmd, priv->dev, and other fields, which would all be use-after-free violations. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning. This bug was introduced in commit 8f641d93c38a ("libertas: detect TX lockups and reset hardware") where del_timer() was used instead of del_timer_sync() in the cleanup path. The command_timer has had the same issue since the driver was first written.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 2.6.24 hingga sebelum 5.10.253 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.203 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.167 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.130 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.12.78 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.18.17 |
| linux | linux kernel | Versi 6.19 hingga sebelum 6.19.7 |
| linux | linux kernel | Versi 7.0 rc1 |