摘要:
There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn t handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659
安全等级: Low
公告ID: KylinSec-SA-2022-2152
发布日期: 2022年10月21日
关联CVE: CVE-2022-3176
There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn t handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659
| cve名称 | 产品 | 组件 | 是否受影响 |
|---|---|---|---|
| CVE-2022-3176 | KY3.4-4A | kernel | Unaffected |
| CVE-2022-3176 | KY3.4-5A | kernel | Unaffected |
| CVE-2022-3176 | KY3.5.1 | kernel | Unaffected |
