(RHSA-2022:0821) 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):

• kernel: improper initialization of the “flags” member of the new pipe_buffer (CVE-2022-0847)

• kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)

• kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)

• kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)

• kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)

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):

• kernel-rt: update RT source tree to the latest RHEL-8.2.z16 Batch (BZ#2057698)