RHSA-2021:4774: Important: kernel security update
First published: Tue Nov 23 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 | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-abi-whitelists | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-debug | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-debug-devel | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-debuginfo | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-devel | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-doc | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-headers | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-tools | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-tools-libs | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/perf | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/perf-debuginfo | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/python-perf | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
| redhat/python-perf-debuginfo | <3.10.0-327.102.1.el7 | 3.10.0-327.102.1.el7 |
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Reference Links
Frequently Asked Questions
What security issue is addressed in RHSA-2021:4774?
RHSA-2021:4774 addresses a use-after-free vulnerability in the Linux kernel found in drivers/infiniband/core/ucma.c that is identified as CVE-2020-36385.
What is the severity of RHSA-2021:4774?
The severity of RHSA-2021:4774 is categorized as important, as it may allow an attacker to cause a denial of service or potentially execute arbitrary code.
How do I fix RHSA-2021:4774?
To fix RHSA-2021:4774, upgrade the affected kernel packages to version 3.10.0-327.102.1.el7 or later.
Which packages are affected by RHSA-2021:4774?
The affected packages include various kernel related packages such as kernel, kernel-debug, kernel-devel, and kernel-tools.
What should I do if I cannot upgrade to the fixed version for RHSA-2021:4774?
If you cannot upgrade to the fixed version for RHSA-2021:4774, consider applying mitigations or workarounds as outlined in the security advisory.
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