Alerts This Week
Warning Icon 1 424
Alerts This Week
Warning Icon 1 424

Red Hat Enterprise Linux 8.1 RHSA-2021-0686 Important Kernel Fixes

red hat
Calendar Grey March 2, 2021
Dist Redhat Esm H88
Crucial kernel upgrade for Red Hat Enterprise Linux 8.1 introduces patches for vulnerabilities related to privilege escalation and denial of service concerns.
An update for kernel is now available for Red Hat Enterprise Linux 8.1 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 packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: bad kfree in auditfilter.c may lead to escalation of privilege (CVE-2020-0444)
* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)
* kernel: performance counters race condition use-after-free (CVE-2020-14351)
* kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)
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):
* [Hyper-V][RHEL-8] Request to included a commit that adds a timeout to vmbus_wait_for_unload (BZ#1913530)
* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap (BZ#1929908)
* rpmbuild cannot build the userspace RPMs in the kernel package when the kernel itself is not built (BZ#1929912)

Topics%20covered

Topics Covered

security advisory red hat privilege escalation bug fix DoS attack DoS Red Hat Enterprise Linux important kernel escalation kernel fixes important severity

References

https://access.redhat.com/security/cve/CVE-2020-0444 https://access.redhat.com/security/cve/CVE-2020-14351 https://access.redhat.com/security/cve/CVE-2020-25705 https://access.redhat.com/security/cve/CVE-2020-29661 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.1):
Source: kernel-4.18.0-147.43.1.el8_1.src.rpm
aarch64: bpftool-4.18.0-147.43.1.el8_1.aarch64.rpm bpftool-debuginfo-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-core-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-cross-headers-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debug-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debug-core-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debug-debuginfo-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debug-devel-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debug-modules-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debug-modules-extra-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debuginfo-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-devel-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-headers-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-modules-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-modules-extra-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-tools-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-tools-debuginfo-4.18.0-147.43.1.el8_1.aarch64.rpm kernel-tools-libs-4.18.0-147.43.1.el8_1.aarch64.rpm perf-4.18.0-147.43.1.el8_1.aarch64.rpm perf-debuginfo-4.18.0-147.43.1.el8_1.aarch64.rpm python3-perf-4.18.0-147.43.1.el8_1.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0686-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0686
Issue date: 2021-03-02

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.1Extended 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 red hat privilege escalation bug fix DoS attack DoS Red Hat Enterprise Linux important kernel escalation kernel fixes important severity

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.1) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1862849 - CVE-2020-14351 kernel: performance counters race condition use-after-free

1894579 - CVE-2020-25705 kernel: ICMP rate limiting can be used for DNS poisoning attack

1906525 - CVE-2020-29661 kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free

1920474 - CVE-2020-0444 kernel: bad kfree in auditfilter.c may lead to escalation of privilege

Get the latest News and Insights

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

Your message here