Alerts This Week
Warning Icon 1 640
Alerts This Week
Warning Icon 1 640

RedHat: RHSA-2022-1209 Critical Kernel-Rt Denial of Service Vulnerability

red hat
Calendar Grey April 5, 2022
Dist Redhat Esm H88
Critical kernel security and bug fix patch released for Red Hat Enterprise Linux, classified as high priority. Find more information within!
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 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: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435)
* kernel: out-of-bounds read in in vc_do_resize function in drivers/tty/vt/vt.c (CVE-2020-8647)
* kernel: invalid read location in vgacon_invert_region function in drivers/video/console/vgacon.c (CVE-2020-8649)
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 latest RHEL-8.2.z16 Batch (BZ#2066950)

Topics%20covered

Topics Covered

security advisory security issue bug fix important red hat enterprise linux dos kernel-rt

References

https://access.redhat.com/security/cve/CVE-2020-8647 https://access.redhat.com/security/cve/CVE-2020-8649 https://access.redhat.com/security/cve/CVE-2022-0435 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2):
Source: kernel-rt-4.18.0-193.80.1.rt13.130.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debug-kvm-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-kvm-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time EUS (v. 8.2):
Source: kernel-rt-4.18.0-193.80.1.rt13.130.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.80.1.rt13.130.el8_2.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:1209-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1209
Issue date: 2022-04-05

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2Extended 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 security issue bug fix important red hat enterprise linux dos kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time EUS (v. 8.2) - x86_64

Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) - x86_64

Bugs Fixed

1802555 - CVE-2020-8649 kernel: invalid read location in vgacon_invert_region function in drivers/video/console/vgacon.c

1802563 - CVE-2020-8647 kernel: out-of-bounds read in in vc_do_resize function in drivers/tty/vt/vt.c

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