RHSA-2021:3440: 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): kernel: slab-out-of-bounds access in xdrsetpagebase() in net/sunrpc/xdr.c (CVE-2021-38201) 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): OSLAT spikes on subset of cpus (BZ#1986063) kernel-rt: update RT source tree to the RHEL-8.4.z source tree (BZ#1990013) Failure to enter fullnohz due to needless SCHED softirqs (BZ#1990272) kernel-rt: Make rcunormalafterboot writable (BZ#1995431)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:3440?
The severity of RHSA-2021:3440 is categorized as important.
How do I fix RHSA-2021:3440?
To fix RHSA-2021:3440, update your kernel-rt packages to version 4.18.0-305.17.1.rt7.89.el8_4.
What vulnerability is addressed in RHSA-2021:3440?
RHSA-2021:3440 addresses a slab-out-of-bounds access vulnerability in xdr_set_page_base() in net/sunrpc/xdr.c (CVE-2021-38201).
Which packages are affected by RHSA-2021:3440?
The affected packages for RHSA-2021:3440 include kernel-rt, kernel-rt-core, and various kernel-rt-debug packages.
What is the main purpose of kernel-rt packages related to RHSA-2021:3440?
Kernel-rt packages provide a Real Time Linux Kernel that is optimized for systems requiring high determinism.