CVE-2023-52629 In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid…
Description
In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below: (cpu 0) | (cpu 1) switch_drv_remove() | flush_work() | ... | switch_timer // timer | schedule_work(&psw->work) timer_shutdown_sync() | ... | switch_work_handler // worker kfree(psw) // free | | psw->state = 0 // use This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Linux 6.6 | premières → < 6.6 | 6.6 |
| Linux 6.5 | premières → < 6.5.4 | 6.5.4 |
| Linux 6.1 | premières → < 6.1.189 | 6.1.189 |
| Linux | 2.6.20 | Pas de correctif indiqué |
| linux_kernel 9 | 9f5e8eee5cfe → < 610dbd8ac271 | 610dbd8ac271 |
| linux_kernel 6.54 | premières → < 6.54 | 6.54 |
| linux_kernel | 2.6.20 | Pas de correctif indiqué |
Références
- git.kernel.org git.kernel.org
- git.kernel.org git.kernel.org
- git.kernel.org git.kernel.org
Chronologie
- Publiée
- Dernière modification