Alerts This Week
Warning Icon 1 840
Alerts This Week
Warning Icon 1 840

Red Hat Enterprise Linux 8 RHSA-2021:4088-01 Important: Kernel-RT Issues

red hat
Calendar Grey November 2, 2021
Dist Redhat Esm H88
Critical vulnerability patch for Red Hat Enterprise Linux 8, targeting significant security issues and enhancements.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8

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 drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)
* kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (CVE-2021-0512)
* kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656)
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.z source tree (BZ#2004117)

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux important system reboot kernel-rt

References

https://access.redhat.com/security/cve/CVE-2020-36385 https://access.redhat.com/security/cve/CVE-2021-0512 https://access.redhat.com/security/cve/CVE-2021-3656 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-305.25.1.rt7.97.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm
Red Hat Enterprise Linux Real Time (v. 8):
Source: kernel-rt-4.18.0-305.25.1.rt7.97.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.25.1.rt7.97.el8_4.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4088-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4088
Issue date: 2021-11-02

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.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 bug fix Red Hat Enterprise Linux important system reboot kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time (v. 8) - x86_64

Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64

Bugs Fixed

1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free

1974491 - CVE-2021-0512 kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c

1983988 - CVE-2021-3656 kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)

Get the latest News and Insights

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

Your message here