RHSA-2022:6437: Moderate: 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): Incomplete cleanup of multi-core shared buffers (aka SBDR) (CVE-2022-21123) Incomplete cleanup of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125) Incomplete cleanup in specific special register write operations (aka DRPW) (CVE-2022-21166) 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): The latest RHEL 8.6.z3 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2111112)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2022:6437?
The severity of RHSA-2022:6437 is significant due to the incomplete cleanup of multi-core shared buffers that may lead to information leaks.
How do I fix RHSA-2022:6437?
To fix RHSA-2022:6437, you must update the affected kernel-rt packages to version 4.18.0-372.26.1.rt7.183.el8_6 or later.
What systems are affected by RHSA-2022:6437?
RHSA-2022:6437 affects systems running the Real Time Linux Kernel, specifically those with the kernel-rt packages prior to version 4.18.0-372.26.1.rt7.183.el8_6.
What are the main vulnerabilities addressed in RHSA-2022:6437?
RHSA-2022:6437 addresses vulnerabilities related to incomplete cleanup of multi-core shared buffers (CVE-2022-21123).
Is a reboot required after applying the RHSA-2022:6437 update?
Yes, a reboot is typically required to fully apply the updates and ensure the new kernel version is loaded.