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Red Hat: RHSA-2022:0958-01 Important: Kernel Privilege Escalation Fix

red hat
Calendar Grey March 17, 2022
Dist Redhat Esm H88
Crucial kpatch-patch-4_18_0-147_58_2 upgrade for Red Hat mitigates severe vulnerabilities impacting the kernel.
An update for kpatch-patch-4_18_0-147_58_1 is now available for Red Hat Enterprise Linux 8.1 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: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* kernel: use-after-free in RDMA listen() (CVE-2021-4028)
* kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)
* kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)
* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)
* 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.
Bug Fix(es):
* Several kpatch CVEs needed for kernel-4.18.0-147.58.1.el8_1 (BZ#2064297)

Topics%20covered

Topics Covered

security advisory Red Hat local privilege escalation kernel patch security impact system fix important update

References

https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2021-4083 https://access.redhat.com/security/cve/CVE-2021-4155 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-0492 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS E4S (v. 8.1):
Source: kpatch-patch-4_18_0-147_58_1-1-1.el8_1.src.rpm
ppc64le: kpatch-patch-4_18_0-147_58_1-1-1.el8_1.ppc64le.rpm kpatch-patch-4_18_0-147_58_1-debuginfo-1-1.el8_1.ppc64le.rpm kpatch-patch-4_18_0-147_58_1-debugsource-1-1.el8_1.ppc64le.rpm
x86_64: kpatch-patch-4_18_0-147_58_1-1-1.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_58_1-debuginfo-1-1.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_58_1-debugsource-1-1.el8_1.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


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0958-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0958
Issue date: 2022-03-17

Topic

An update for kpatch-patch-4_18_0-147_58_1 is now available for Red HatEnterprise Linux 8.1 Update Services for 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 local privilege escalation kernel patch security impact system fix important update

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS E4S (v. 8.1) - ppc64le, x86_64

Bugs Fixed

2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen()

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

2034813 - CVE-2021-4155 kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL

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

2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation

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