Alerts This Week
Warning Icon 1 692
Alerts This Week
Warning Icon 1 692

Red Hat Enterprise Linux 8.4: RHSA-2022-0771-01 Important Kernel-RT Bug Fix

red hat
Calendar Grey March 8, 2022
Dist Redhat Esm H88
Critical kernel-rt security patch released for Red Hat Enterprise Linux 8.4, targeting several identified vulnerabilities.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4 Extended Update Support

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

The system must be rebooted for this update to take effect.

Summary

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
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: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435)
* 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):
* kernel-rt: update RT source tree to the RHEL-8.4.z7 source tree (BZ#2042461)

Topics%20covered

Topics Covered

security advisory privilege escalation bug fix DoS Red Hat Enterprise Linux important update kernel-rt

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-2022-0330 https://access.redhat.com/security/cve/CVE-2022-0435 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4):
Source: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm
Red Hat Enterprise Linux Real Time EUS (v.8.4):
Source: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.40.1.rt7.112.el8_4.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0771-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0771
Issue date: 2022-03-08

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4Extended Update Support.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 privilege escalation bug fix DoS Red Hat Enterprise Linux important update kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time EUS (v.8.4) - x86_64

Red Hat Enterprise Linux Real Time for NFV EUS (v.8.4) - x86_64

Bugs Fixed

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

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

2048738 - CVE-2022-0435 kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here