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Red Hat 7.3 RHSA-2021:3766-01 Important: Kernel Memory Corruption

red hat
Calendar Grey October 12, 2021
Dist Redhat Esm H88
Ensure you are aware of the significant kernel patch for Red Hat and its potential security ramifications on your infrastructure.
An update for kernel is now available for Red Hat Enterprise Linux 7.3 Advanced Update Support

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)
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.

Topics%20covered

Topics Covered

security advisory update red hat memory corruption important kernel security impact

References

https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.3):
Source: kernel-3.10.0-514.93.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-514.93.1.el7.noarch.rpm kernel-doc-3.10.0-514.93.1.el7.noarch.rpm
x86_64: kernel-3.10.0-514.93.1.el7.x86_64.rpm kernel-debug-3.10.0-514.93.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.93.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.93.1.el7.x86_64.rpm kernel-devel-3.10.0-514.93.1.el7.x86_64.rpm kernel-headers-3.10.0-514.93.1.el7.x86_64.rpm kernel-tools-3.10.0-514.93.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.93.1.el7.x86_64.rpm perf-3.10.0-514.93.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm python-perf-3.10.0-514.93.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.3):
x86_64: kernel-debug-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.93.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.93.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.93.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3766-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3766
Issue date: 2021-10-12

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.3Advanced Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update red hat memory corruption important kernel security impact

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.3) - noarch, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.3) - x86_64

Bugs Fixed

1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption

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