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.<br>Security Fix(es):<br><li> kernel: Use After Free in unixgc() which could result in a local privilege escalation (CVE-2021-0920)</li> <li> kernel: use-after-free in RDMA listen() (CVE-2021-4028)</li> <li> kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)</li> <li> kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435)</li> <li> kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)</li> 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.<br>Bug Fix(es):<br><li> kernel-rt: update RT source tree to the RHEL-8.4.z7 source tree (BZ#2042461)</li>
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2022:0771?
The severity of RHSA-2022:0771 is classified as high due to the potential for local privilege escalation.
How do I fix RHSA-2022:0771?
To fix RHSA-2022:0771, update the kernel-rt packages to version 4.18.0-305.40.1.rt7.112.el8_4.
What are the affected versions for RHSA-2022:0771?
The affected versions for RHSA-2022:0771 are all versions prior to 4.18.0-305.40.1.rt7.112.el8_4.
What vulnerability does RHSA-2022:0771 address?
RHSA-2022:0771 addresses a Use After Free vulnerability in unix_gc() identified by CVE-2021-0920.
Who is affected by RHSA-2022:0771?
Users running the affected kernel-rt packages on supported Red Hat systems are at risk from RHSA-2022:0771.