CVE-2021-47111

CVE-2021-47111 affects the Linux kernel xen-netback where the RX task thread could be freed before kthread_stop during backend teardown, causing a use-after-free. The fix reintroduces taking a reference to the RX task thread and adds an explanation why it’s needed (XSA-374 / CVE-2021-28691). Affe...