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Red Hat Enterprise Linux 8: RHSA-2021-2168-01 Important Kernel Update

red hat
Calendar Grey June 1, 2021
Dist Redhat Esm H88
Canonical has issued a vital kernel security and bug resolution update focused on fixing vulnerabilities linked to the QEMU subsystem and additional issues.
An update for kernel 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 packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501)
* kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)
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):
* OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944667)
* Selinux: The task calling security_set_bools() deadlocks with itself when it later calls selinux_audit_rule_match(). (BZ#1945123)
* [mlx5] tc flower mpls match options does not work (BZ#1952061)
* mlx5: missing patches for ct.rel (BZ#1952062)
* CT HWOL: with OVN/OVS, intermittently, load balancer hairpin TCP packets get dropped for seconds in a row (BZ#1952065)
* [Lenovo 8.3 bug] Blackscreen after clicking on "Settings" icon from top-right corner. (BZ#1952900)
* RHEL 8.x missing uio upstream fix. (BZ#1952952)
* Turbostat doesn't show any measured data on AMD Milan (BZ#1952987)
* P620 no sound from front headset jack (BZ#1954545)
* RHEL kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps. (BZ#1955188)
* [net/sched] connection failed with DNAT + SNAT by tc action ct (BZ#1956458)

Topics%20covered

Topics Covered

security advisory kernel update bug fix security impact red hat enterprise linux important fix KVM API misuse

References

https://access.redhat.com/security/cve/CVE-2021-3501 https://access.redhat.com/security/cve/CVE-2021-3543 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: kernel-4.18.0-305.3.1.el8_4.src.rpm
aarch64: bpftool-4.18.0-305.3.1.el8_4.aarch64.rpm bpftool-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-core-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-cross-headers-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debug-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debug-core-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debug-devel-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debug-modules-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-devel-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-headers-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-modules-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-modules-extra-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-tools-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm kernel-tools-libs-4.18.0-305.3.1.el8_4.aarch64.rpm perf-4.18.0-305.3.1.el8_4.aarch64.rpm perf-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm python3-perf-4.18.0-305.3.1.el8_4.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2168-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2168
Issue date: 2021-06-01

Topic

An update for kernel 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 kernel update bug fix security impact red hat enterprise linux important fix KVM API misuse

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1950136 - CVE-2021-3501 kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run

1953022 - CVE-2021-3543 kernel: nitro_enclaves stale file descriptors on failed usercopy

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