(RHSA-2022:0771) 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: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)

• kernel: use-after-free in RDMA listen() (CVE-2021-4028)

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

• kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435)

• 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 RHEL-8.4.z7 source tree (BZ#2042461)