RHSA-2021:4871: Important: kernel security and bug fix update
Published Nov 30, 2021
·Updated
The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385) kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317) 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): [IBM 8.4] [P10] P10 hardware counter (performance counters/perf:) support (BZ#1994075) RHEL8.1 Snapshot1 - [4.18.0-128.el8.ppc64le] [ Brazos 31TB/192 Core ] While running upstream kernel selftest case system crashed (TM) (BZ#1996057) [kernel-debug] WARNING: possible circular locking dependency detected (modulemutex & textmutex) (BZ#2013777)
Affected Software
105 affected componentsFixes available
redhat/kernel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/bpftool<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/bpftool-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-abi-whitelists<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-core<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-cross-headers<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-core<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-modules<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-modules-extra<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-doc<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-headers<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-modules<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-modules-extra<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools-libs<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/perf<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/perf-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/python3-perf<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/python3-perf-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/bpftool<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/bpftool-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-core<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-cross-headers<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-core<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-modules<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-modules-extra<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debuginfo-common-s390x<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-headers<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-modules<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-modules-extra<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-zfcpdump<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-zfcpdump-core<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-zfcpdump-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-zfcpdump-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-zfcpdump-modules<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-zfcpdump-modules-extra<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/perf<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/perf-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/python3-perf<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/python3-perf-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/bpftool<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/bpftool-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-core<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-cross-headers<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-core<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-modules<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debug-modules-extra<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-debuginfo-common-ppc64le<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-headers<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-modules<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-modules-extra<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools-libs<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/perf<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/perf-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/python3-perf<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/python3-perf-debuginfo<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/bpftool<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/bpftool-debuginfo<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-core<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-cross-headers<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debug<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debug-core<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debug-debuginfo<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debug-devel<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debug-modules<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debug-modules-extra<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debuginfo<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-debuginfo-common-aarch64<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-devel<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-headers<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-modules<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-modules-extra<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-tools<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-tools-debuginfo<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-tools-libs<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/perf<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/perf-debuginfo<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/python3-perf<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/python3-perf-debuginfo<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
redhat/kernel-tools-libs-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools-libs-devel<4.18.0-193.70.1.el8_2
4.18.0-193.70.1.el8_2
redhat/kernel-tools-libs-devel<4.18.0-193.70.1.el8_2.aa
4.18.0-193.70.1.el8_2.aa
Remediation
Event History
Nov 30, 2021
Advisory Published
via Red Hat·12:00 AM
Frequently Asked Questions
1
What is the severity of RHSA-2021:4871?
RHSA-2021:4871 is classified as important due to vulnerabilities in the kernel.
2
How do I fix RHSA-2021:4871?
To fix RHSA-2021:4871, update the affected kernel packages to version 4.18.0-193.70.1.el8_2.
3
What vulnerabilities are addressed in RHSA-2021:4871?
RHSA-2021:4871 addresses a use-after-free vulnerability in the Infiniband driver (CVE-2020-36385) and a timer tree corruption issue.
4
Which packages are affected by RHSA-2021:4871?
RHSA-2021:4871 affects various kernel-related packages including kernel, bpftool, and kernel-devel among others.
5
When was RHSA-2021:4871 released?
RHSA-2021:4871 was released on December 8, 2021.