Mageia 7/8: 2021-0174 Critical: Kernel Denial of Service Threat

This kernel update is based on upstream 5.10.27 and fixes atleast the following security issues:
The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. A malicious or buggy frontend driver may be able to cause resource leaks from the corresponding backend driver. This can result in a host-wide Denial of Sevice (DoS). (CVE-2021-28688 / XSA-371).
An issue was discovered in fs/io_uring.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (deadlock) because exit may be waiting to park a SQPOLL thread, but concurrently that SQPOLL thread is waiting for a signal to start (CVE-2021-...