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
CPE | Name | Operator | Version |
---|---|---|---|
debian_linux | eq | 10.0 | |
debian_linux | eq | 11.0 | |
linux_kernel | ge | 5.1 | |
linux_kernel | lt | 5.4.212 | |
linux_kernel | ge | 5.5 | |
linux_kernel | lt | 5.10.141 | |
linux_kernel | ge | 5.11 | |
linux_kernel | lt | 5.15.65 | |
linux_kernel | ge | 5.16 | |
linux_kernel | lt | 5.17 |