RedHat: RHSA-2022-1103:01 Important: kpatch-patch security update
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: Use After Free in unix_gc() which could result in a local
privilege escalation (CVE-2021-0920)
* kernel: fget: check that the fd still exists after getting a ref to it
(CVE-2021-4083)
* kernel: possible privileges escalation due to missing TLB flush
(CVE-2022-0330)
* kernel: failing usercopy allows for use-after-free exploitation
(CVE-2022-22942)
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.
Summary
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
References
https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4083 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-22942 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_72_1-1-6.el7.src.rpm
kpatch-patch-3_10_0-957_76_1-1-6.el7.src.rpm
kpatch-patch-3_10_0-957_78_2-1-5.el7.src.rpm
kpatch-patch-3_10_0-957_80_1-1-4.el7.src.rpm
kpatch-patch-3_10_0-957_84_1-1-3.el7.src.rpm
kpatch-patch-3_10_0-957_86_1-1-2.el7.src.rpm
kpatch-patch-3_10_0-957_88_1-1-1.el7.src.rpm
ppc64le:
kpatch-patch-3_10_0-957_72_1-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_72_1-debuginfo-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_76_1-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_76_1-debuginfo-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_78_2-1-5.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_78_2-debuginfo-1-5.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_80_1-1-4.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_80_1-debuginfo-1-4.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_84_1-1-3.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_84_1-debuginfo-1-3.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_86_1-1-2.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_86_1-debuginfo-1-2.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_88_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_88_1-debuginfo-1-1.el7.ppc64le.rpm
x86_64:
kpatch-patch-3_10_0-957_72_1-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_72_1-debuginfo-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_76_1-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_76_1-debuginfo-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_78_2-1-5.el7.x86_64.rpm
kpatch-patch-3_10_0-957_78_2-debuginfo-1-5.el7.x86_64.rpm
kpatch-patch-3_10_0-957_80_1-1-4.el7.x86_64.rpm
kpatch-patch-3_10_0-957_80_1-debuginfo-1-4.el7.x86_64.rpm
kpatch-patch-3_10_0-957_84_1-1-3.el7.x86_64.rpm
kpatch-patch-3_10_0-957_84_1-debuginfo-1-3.el7.x86_64.rpm
kpatch-patch-3_10_0-957_86_1-1-2.el7.x86_64.rpm
kpatch-patch-3_10_0-957_86_1-debuginfo-1-2.el7.x86_64.rpm
kpatch-patch-3_10_0-957_88_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_88_1-debuginfo-1-1.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for kpatch-patch is now available for Red Hat Enterprise Linux 7.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.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Server E4S (v. 7.6) - ppc64le, x86_64
Bugs Fixed
2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it
2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation
2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush
2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation