Tracker / CVE-2022-3176
CVE-2022-3176
High 7.8
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
Affected products and versions
| debian | debian_linux |
|---|---|
| linux | linux_kernel · 5.1 → 5.4.212 |
| linux | linux_kernel · 5.11 → 5.15.65 |
| linux | linux_kernel · 5.16 → 5.17 |
| linux | linux_kernel · 5.5 → 5.10.141 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.