RHSA-2021:3181: Important: kpatch-patch security update
First published: Tue Aug 17 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.<br>Security Fix(es):<br><li> kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)</li> <li> kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)</li> <li> kernel: race condition for removal of the HCI controller (CVE-2021-32399)</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/kpatch-patch | <4_18_0-147_27_1-1-12.el8_1 | 4_18_0-147_27_1-1-12.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_32_1-1-10.el8_1 | 4_18_0-147_32_1-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_34_1-1-10.el8_1 | 4_18_0-147_34_1-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_38_1-1-9.el8_1 | 4_18_0-147_38_1-1-9.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_43_1-1-7.el8_1 | 4_18_0-147_43_1-1-7.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_44_1-1-6.el8_1 | 4_18_0-147_44_1-1-6.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_48_1-1-3.el8_1 | 4_18_0-147_48_1-1-3.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_1-1-2.el8_1 | 4_18_0-147_51_1-1-2.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_2-1-1.el8_1 | 4_18_0-147_51_2-1-1.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_27_1-1-12.el8_1 | 4_18_0-147_27_1-1-12.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_27_1-debuginfo-1-12.el8_1 | 4_18_0-147_27_1-debuginfo-1-12.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_27_1-debugsource-1-12.el8_1 | 4_18_0-147_27_1-debugsource-1-12.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_32_1-1-10.el8_1 | 4_18_0-147_32_1-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_32_1-debuginfo-1-10.el8_1 | 4_18_0-147_32_1-debuginfo-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_32_1-debugsource-1-10.el8_1 | 4_18_0-147_32_1-debugsource-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_34_1-1-10.el8_1 | 4_18_0-147_34_1-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_34_1-debuginfo-1-10.el8_1 | 4_18_0-147_34_1-debuginfo-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_34_1-debugsource-1-10.el8_1 | 4_18_0-147_34_1-debugsource-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_38_1-1-9.el8_1 | 4_18_0-147_38_1-1-9.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_38_1-debuginfo-1-9.el8_1 | 4_18_0-147_38_1-debuginfo-1-9.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_38_1-debugsource-1-9.el8_1 | 4_18_0-147_38_1-debugsource-1-9.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_43_1-1-7.el8_1 | 4_18_0-147_43_1-1-7.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_43_1-debuginfo-1-7.el8_1 | 4_18_0-147_43_1-debuginfo-1-7.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_43_1-debugsource-1-7.el8_1 | 4_18_0-147_43_1-debugsource-1-7.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_44_1-1-6.el8_1 | 4_18_0-147_44_1-1-6.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_44_1-debuginfo-1-6.el8_1 | 4_18_0-147_44_1-debuginfo-1-6.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_44_1-debugsource-1-6.el8_1 | 4_18_0-147_44_1-debugsource-1-6.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_48_1-1-3.el8_1 | 4_18_0-147_48_1-1-3.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_48_1-debuginfo-1-3.el8_1 | 4_18_0-147_48_1-debuginfo-1-3.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_48_1-debugsource-1-3.el8_1 | 4_18_0-147_48_1-debugsource-1-3.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_1-1-2.el8_1 | 4_18_0-147_51_1-1-2.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_1-debuginfo-1-2.el8_1 | 4_18_0-147_51_1-debuginfo-1-2.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_1-debugsource-1-2.el8_1 | 4_18_0-147_51_1-debugsource-1-2.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_2-1-1.el8_1 | 4_18_0-147_51_2-1-1.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_2-debuginfo-1-1.el8_1 | 4_18_0-147_51_2-debuginfo-1-1.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_2-debugsource-1-1.el8_1 | 4_18_0-147_51_2-debugsource-1-1.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_27_1-1-12.el8_1 | 4_18_0-147_27_1-1-12.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_27_1-debuginfo-1-12.el8_1 | 4_18_0-147_27_1-debuginfo-1-12.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_27_1-debugsource-1-12.el8_1 | 4_18_0-147_27_1-debugsource-1-12.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_32_1-1-10.el8_1 | 4_18_0-147_32_1-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_32_1-debuginfo-1-10.el8_1 | 4_18_0-147_32_1-debuginfo-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_32_1-debugsource-1-10.el8_1 | 4_18_0-147_32_1-debugsource-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_34_1-1-10.el8_1 | 4_18_0-147_34_1-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_34_1-debuginfo-1-10.el8_1 | 4_18_0-147_34_1-debuginfo-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_34_1-debugsource-1-10.el8_1 | 4_18_0-147_34_1-debugsource-1-10.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_38_1-1-9.el8_1 | 4_18_0-147_38_1-1-9.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_38_1-debuginfo-1-9.el8_1 | 4_18_0-147_38_1-debuginfo-1-9.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_38_1-debugsource-1-9.el8_1 | 4_18_0-147_38_1-debugsource-1-9.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_43_1-1-7.el8_1 | 4_18_0-147_43_1-1-7.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_43_1-debuginfo-1-7.el8_1 | 4_18_0-147_43_1-debuginfo-1-7.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_43_1-debugsource-1-7.el8_1 | 4_18_0-147_43_1-debugsource-1-7.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_44_1-1-6.el8_1 | 4_18_0-147_44_1-1-6.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_44_1-debuginfo-1-6.el8_1 | 4_18_0-147_44_1-debuginfo-1-6.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_44_1-debugsource-1-6.el8_1 | 4_18_0-147_44_1-debugsource-1-6.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_48_1-1-3.el8_1 | 4_18_0-147_48_1-1-3.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_48_1-debuginfo-1-3.el8_1 | 4_18_0-147_48_1-debuginfo-1-3.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_48_1-debugsource-1-3.el8_1 | 4_18_0-147_48_1-debugsource-1-3.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_1-1-2.el8_1 | 4_18_0-147_51_1-1-2.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_1-debuginfo-1-2.el8_1 | 4_18_0-147_51_1-debuginfo-1-2.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_1-debugsource-1-2.el8_1 | 4_18_0-147_51_1-debugsource-1-2.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_2-1-1.el8_1 | 4_18_0-147_51_2-1-1.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_2-debuginfo-1-1.el8_1 | 4_18_0-147_51_2-debuginfo-1-1.el8_1 |
| redhat/kpatch-patch | <4_18_0-147_51_2-debugsource-1-1.el8_1 | 4_18_0-147_51_2-debugsource-1-1.el8_1 |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2021:3181?
RHSA-2021:3181 has been classified with high severity due to vulnerabilities that can lead to privilege escalation.
How do I fix RHSA-2021:3181?
To fix RHSA-2021:3181, update the kpatch-patch package to the latest version as specified in the Red Hat advisory.
What vulnerabilities are addressed in RHSA-2021:3181?
RHSA-2021:3181 addresses several vulnerabilities including CVE-2021-22543 related to improper handling of VM_IO in KVM.
Which systems are affected by RHSA-2021:3181?
RHSA-2021:3181 affects specific versions of kernel live patch modules on Red Hat Enterprise Linux 8.
Is there a workaround for RHSA-2021:3181 before applying the fix?
Currently, there are no known workarounds for RHSA-2021:3181; updating is strongly advised.
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