RHSA-2021:0537: 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: locking issue in drivers/tty/ttyjobctrl.c can lead to an use-after-free (CVE-2020-29661) kernel: performance counters race condition use-after-free (CVE-2020-14351) kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705) 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-8.3.z2 source tree (BZ#1908433)
Affected Software
Remediation
Event History
Frequently Asked Questions
What security issues are addressed in RHSA-2021:0537?
RHSA-2021:0537 addresses a locking issue in the Linux kernel that can lead to a use-after-free vulnerability identified as CVE-2020-29661.
What software is affected by RHSA-2021:0537?
The RHSA-2021:0537 vulnerability affects the kernel-rt packages, including kernel-rt, kernel-rt-core, and various kernel-rt debug packages.
What is the recommended version to resolve RHSA-2021:0537?
To resolve RHSA-2021:0537, users should update to version 4.18.0-240.15.1.rt7.69.el8_3 of the kernel-rt packages.
How critical is RHSA-2021:0537?
RHSA-2021:0537 is classified as a serious security update due to the potential for exploitation through use-after-free vulnerabilities.
How can I mitigate risks associated with RHSA-2021:0537?
To mitigate risks from RHSA-2021:0537, it's essential to apply the recommended kernel-rt package updates as soon as possible.