sh：push-switch：重新排序清理操作以避免释放后使用错误 (CVE-2023-52629)
CVE编号
CVE-2023-52629利用情况
暂无补丁情况
N/A披露时间
2024-03-29漏洞描述
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.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
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|---|---|
| https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65 | |
| https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de |
- 攻击路径 N/A
- 攻击复杂度 N/A
- 权限要求 N/A
- 影响范围 N/A
- 用户交互 N/A
- 可用性 N/A
- 保密性 N/A
- 完整性 N/A
| CWE-ID | 漏洞类型 |
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