RHSA-2021:3814: Important: kpatch-patch security update

Published Oct 12, 2021
·
Updated

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 VMIO|VMPFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543) kernel: out-of-bounds write in xtcompattargetfromuser() in net/netfilter/xtables.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.

Affected Software

50 affected componentsFixes available
redhat/kpatch-patch<3_10_0-957_61_1-1-6.el7
3_10_0-957_61_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_61_2-1-6.el7
3_10_0-957_61_2-1-6.el7
redhat/kpatch-patch<3_10_0-957_62_1-1-6.el7
3_10_0-957_62_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_65_1-1-6.el7
3_10_0-957_65_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_66_1-1-6.el7
3_10_0-957_66_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_70_1-1-5.el7
3_10_0-957_70_1-1-5.el7
redhat/kpatch-patch<3_10_0-957_72_1-1-3.el7
3_10_0-957_72_1-1-3.el7
redhat/kpatch-patch<3_10_0-957_76_1-1-3.el7
3_10_0-957_76_1-1-3.el7
redhat/kpatch-patch<3_10_0-957_78_2-1-2.el7
3_10_0-957_78_2-1-2.el7
redhat/kpatch-patch<3_10_0-957_80_1-1-1.el7
3_10_0-957_80_1-1-1.el7
redhat/kpatch-patch<3_10_0-957_61_1-1-6.el7
3_10_0-957_61_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_61_1-debuginfo-1-6.el7
3_10_0-957_61_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_61_2-1-6.el7
3_10_0-957_61_2-1-6.el7
redhat/kpatch-patch<3_10_0-957_61_2-debuginfo-1-6.el7
3_10_0-957_61_2-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_62_1-1-6.el7
3_10_0-957_62_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_62_1-debuginfo-1-6.el7
3_10_0-957_62_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_65_1-1-6.el7
3_10_0-957_65_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_65_1-debuginfo-1-6.el7
3_10_0-957_65_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_66_1-1-6.el7
3_10_0-957_66_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_66_1-debuginfo-1-6.el7
3_10_0-957_66_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_70_1-1-5.el7
3_10_0-957_70_1-1-5.el7
redhat/kpatch-patch<3_10_0-957_70_1-debuginfo-1-5.el7
3_10_0-957_70_1-debuginfo-1-5.el7
redhat/kpatch-patch<3_10_0-957_72_1-1-3.el7
3_10_0-957_72_1-1-3.el7
redhat/kpatch-patch<3_10_0-957_72_1-debuginfo-1-3.el7
3_10_0-957_72_1-debuginfo-1-3.el7
redhat/kpatch-patch<3_10_0-957_76_1-1-3.el7
3_10_0-957_76_1-1-3.el7
redhat/kpatch-patch<3_10_0-957_76_1-debuginfo-1-3.el7
3_10_0-957_76_1-debuginfo-1-3.el7
redhat/kpatch-patch<3_10_0-957_78_2-1-2.el7
3_10_0-957_78_2-1-2.el7
redhat/kpatch-patch<3_10_0-957_78_2-debuginfo-1-2.el7
3_10_0-957_78_2-debuginfo-1-2.el7
redhat/kpatch-patch<3_10_0-957_80_1-1-1.el7
3_10_0-957_80_1-1-1.el7
redhat/kpatch-patch<3_10_0-957_80_1-debuginfo-1-1.el7
3_10_0-957_80_1-debuginfo-1-1.el7
redhat/kpatch-patch<3_10_0-957_61_1-1-6.el7
3_10_0-957_61_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_61_1-debuginfo-1-6.el7
3_10_0-957_61_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_61_2-1-6.el7
3_10_0-957_61_2-1-6.el7
redhat/kpatch-patch<3_10_0-957_61_2-debuginfo-1-6.el7
3_10_0-957_61_2-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_62_1-1-6.el7
3_10_0-957_62_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_62_1-debuginfo-1-6.el7
3_10_0-957_62_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_65_1-1-6.el7
3_10_0-957_65_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_65_1-debuginfo-1-6.el7
3_10_0-957_65_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_66_1-1-6.el7
3_10_0-957_66_1-1-6.el7
redhat/kpatch-patch<3_10_0-957_66_1-debuginfo-1-6.el7
3_10_0-957_66_1-debuginfo-1-6.el7
redhat/kpatch-patch<3_10_0-957_70_1-1-5.el7
3_10_0-957_70_1-1-5.el7
redhat/kpatch-patch<3_10_0-957_70_1-debuginfo-1-5.el7
3_10_0-957_70_1-debuginfo-1-5.el7
redhat/kpatch-patch<3_10_0-957_72_1-1-3.el7
3_10_0-957_72_1-1-3.el7
redhat/kpatch-patch<3_10_0-957_72_1-debuginfo-1-3.el7
3_10_0-957_72_1-debuginfo-1-3.el7
redhat/kpatch-patch<3_10_0-957_76_1-1-3.el7
3_10_0-957_76_1-1-3.el7
redhat/kpatch-patch<3_10_0-957_76_1-debuginfo-1-3.el7
3_10_0-957_76_1-debuginfo-1-3.el7
redhat/kpatch-patch<3_10_0-957_78_2-1-2.el7
3_10_0-957_78_2-1-2.el7
redhat/kpatch-patch<3_10_0-957_78_2-debuginfo-1-2.el7
3_10_0-957_78_2-debuginfo-1-2.el7
redhat/kpatch-patch<3_10_0-957_80_1-1-1.el7
3_10_0-957_80_1-1-1.el7
redhat/kpatch-patch<3_10_0-957_80_1-debuginfo-1-1.el7
3_10_0-957_80_1-debuginfo-1-1.el7

Remediation

Event History

Feb 5, 2026
Advisory Published
via Red Hat·02:49 PM
Data Sourced
via Red Hat·02:49 PM
RemedyDescriptionAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of RHSA-2021:3814?

RHSA-2021:3814 is classified as a critical vulnerability due to its potential impact on kernel security.

2

How do I fix RHSA-2021:3814?

To fix RHSA-2021:3814, update the kpatch-patch package to the recommended versions provided by Red Hat.

3

What vulnerabilities does RHSA-2021:3814 address?

RHSA-2021:3814 addresses vulnerabilities in KVM that allow bypassing read-only checks, notably CVE-2021-22543.

4

Which systems are affected by RHSA-2021:3814?

RHSA-2021:3814 affects various Red Hat Enterprise Linux 7 systems using specific versions of the kpatch-patch package.

5

Is there a workaround for RHSA-2021:3814?

There is no specified workaround for RHSA-2021:3814 other than applying the security updates.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203