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Red Hat Enterprise Linux 7.6: RHSA-2021-3814-01 Important Kpatch

red hat
Calendar Grey October 12, 2021
Dist Redhat Esm H88
Critical Red Hat security release for kernel live patches tackling significant vulnerabilities and enhancing system robustness.
An update is now available for Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions

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

Summary

This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)
* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)
* 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 red hat important kernel fix kpatch

References

https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server E4S (v. 7.6):
Source: kpatch-patch-3_10_0-957_61_1-1-6.el7.src.rpm kpatch-patch-3_10_0-957_61_2-1-6.el7.src.rpm kpatch-patch-3_10_0-957_62_1-1-6.el7.src.rpm kpatch-patch-3_10_0-957_65_1-1-6.el7.src.rpm kpatch-patch-3_10_0-957_66_1-1-6.el7.src.rpm kpatch-patch-3_10_0-957_70_1-1-5.el7.src.rpm kpatch-patch-3_10_0-957_72_1-1-3.el7.src.rpm kpatch-patch-3_10_0-957_76_1-1-3.el7.src.rpm kpatch-patch-3_10_0-957_78_2-1-2.el7.src.rpm kpatch-patch-3_10_0-957_80_1-1-1.el7.src.rpm
ppc64le: kpatch-patch-3_10_0-957_61_1-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_61_1-debuginfo-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_61_2-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_61_2-debuginfo-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_62_1-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_62_1-debuginfo-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_65_1-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_65_1-debuginfo-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_66_1-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_66_1-debuginfo-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_70_1-1-5.el7.ppc64le.rpm kpatch-patch-3_10_0-957_70_1-debuginfo-1-5.el7.ppc64le.rpm kpatch-patch-3_10_0-957_72_1-1-3.el7.ppc64le.rpm kpatch-patch-3_10_0-957_72_1-debuginfo-1-3.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3814-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3814
Issue date: 2021-10-12

Topic

An update is now available for Red Hat Enterprise Linux 7.6 Update Servicesfor SAP Solutions.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 red hat important kernel fix kpatch

Relevant Releases Architectures

Red Hat Enterprise Linux Server E4S (v. 7.6) - ppc64le, x86_64

Bugs Fixed

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

1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

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

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