CVE-2022-3176 – There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_ …

Vuln ID: CVE-2022-3176

Published:  2022-09-16  14:15:09Z

Description: 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

Source: NVD.NIST.GOV