发布时间: 2024年7月10日
修改时间: 2024年7月10日
In the Linux kernel, the following vulnerability has been resolved:thermal/debugfs: Prevent use-after-free from occurring after cdev removalSince thermal_debug_cdev_remove() does not run under cdev->lock, it canrun in parallel with thermal_debug_cdev_state_update() and it may freethe struct thermal_debugfs object used by the latter after it has beenchecked against NULL.If that happens, thermal_debug_cdev_state_update() will access memorythat has been freed already causing the kernel to crash.Address this by using cdev->lock in thermal_debug_cdev_remove() aroundthe cdev->debugfs value check (in case the same cdev is removed at thesame time in two different threads) and its reset to NULL.Cc :6.8+ <stable@vger.kernel.org> # 6.8+
| NVD | openEuler | |
|---|---|---|
| CVSS评分 | 5.5 | 5.5 |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality | None | None |
| Integrity | None | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2024-3091 | In the Linux kernel, the following vulnerability has been resolved:thermal/debugfs: Prevent use-after-free from occurring after cdev removalSince thermal_debug_cdev_remove() does not run under cdev->lock, it canrun in parallel with thermal_debug_cdev_state_update() and it may freethe struct thermal_debugfs object used by the latter after it has beenchecked against NULL.If that happens, thermal_debug_cdev_state_update() will access memorythat has been freed already causing the kernel to crash.Address this by using cdev->lock in thermal_debug_cdev_remove() aroundthe cdev->debugfs value check (in case the same cdev is removed at thesame time in two different threads) and its reset to NULL.Cc :6.8+ <stable@vger.kernel.org> # 6.8+ | 2024年7月10日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-5A | kernel | Unaffected |
| KY3.5.2 | kernel | Unaffected |
| V6 | kernel | Unaffected |
