RHSA-2021:4687: Important: kernel security update
First published: Tue Nov 16 2021(Updated: )
The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)</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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/bpftool | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/bpftool-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-abi-whitelists | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-core | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-cross-headers | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-core | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-modules | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-modules-extra | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-doc | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-headers | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-modules | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-modules-extra | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools-libs | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/perf | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/perf-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/python3-perf | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/python3-perf-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/bpftool | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/bpftool-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-core | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-cross-headers | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-core | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-modules | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-modules-extra | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debuginfo-common-s390x | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-headers | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-modules | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-modules-extra | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-zfcpdump | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-zfcpdump-core | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-zfcpdump-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-zfcpdump-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-zfcpdump-modules | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-zfcpdump-modules-extra | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/perf | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/perf-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/python3-perf | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/python3-perf-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/bpftool | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/bpftool-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-core | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-cross-headers | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-core | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-modules | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debug-modules-extra | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-debuginfo-common-ppc64le | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-headers | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-modules | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-modules-extra | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools-libs | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/perf | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/perf-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/python3-perf | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/python3-perf-debuginfo | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/bpftool | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/bpftool-debuginfo | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-core | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-cross-headers | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debug | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debug-core | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debug-debuginfo | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debug-devel | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debug-modules | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debug-modules-extra | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debuginfo | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-debuginfo-common-aarch64 | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-devel | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-headers | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-modules | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-modules-extra | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-tools | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-tools-debuginfo | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-tools-libs | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/perf | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/perf-debuginfo | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/python3-perf | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/python3-perf-debuginfo | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
| redhat/kernel-tools-libs-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools-libs-devel | <4.18.0-147.57.1.el8_1 | 4.18.0-147.57.1.el8_1 |
| redhat/kernel-tools-libs-devel | <4.18.0-147.57.1.el8_1.aa | 4.18.0-147.57.1.el8_1.aa |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2021:4687?
The severity of RHSA-2021:4687 is classified as important.
How do I fix RHSA-2021:4687?
To fix RHSA-2021:4687, update the kernel packages to version 4.18.0-147.57.1.el8_1 or later.
What vulnerability does RHSA-2021:4687 address?
RHSA-2021:4687 addresses a use-after-free vulnerability in the Linux kernel related to drivers/infiniband/core/ucma.c.
Which systems are affected by RHSA-2021:4687?
RHSA-2021:4687 affects systems running the specified versions of Red Hat kernel packages.
Is a system reboot required after applying the fix for RHSA-2021:4687?
Yes, a system reboot is typically required to fully apply the kernel updates associated with RHSA-2021:4687.
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