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Red Hat Enterprise Linux 8: RHSA-2021:2599-01 Important Kernel-RT Update

red hat
Calendar Grey June 29, 2021
Dist Redhat Esm H88
A vital kernel-rt security patch for Red Hat Enterprise Linux addresses critical vulnerabilities. Uncover the specifics.
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 net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)
* kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)
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.z1 source tree (BZ#1965378)
* panic caused by i40e_msix_clean_rings [rhel-rt] (BZ#1965970)

Topics%20covered

Topics Covered

security advisory Red Hat bug fix security fix kernel-rt Important real time

References

https://access.redhat.com/security/cve/CVE-2020-26541 https://access.redhat.com/security/cve/CVE-2021-33034 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm
Red Hat Enterprise Linux Real Time (v. 8):
Source: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.7.1.rt7.79.el8_4.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2599-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2599
Issue date: 2021-06-29

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 Red Hat bug fix security fix kernel-rt Important real time

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

1886285 - CVE-2020-26541 kernel: security bypass in certs/blacklist.c and certs/system_keyring.c

1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

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