(RHSA-2022:8673) Important: kernel-rt security and bug fix update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• KVM: cmpxchg_gpte can write to pfns outside the userspace region (CVE-2022-1158)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• Multicast packets are not received by all VFs on the same port even though they have the same VLAN (BZ#2117027)

• Backport use of a dedicate thread for timer wakeups (BZ#2127206)

• Update RT source tree to the RHEL-8.4.z13 source tree. (BZ#2129948)

• Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel [RT-8] (BZ#2139853)