Low: virt:av and virt-devel:av security and bug fix update

Topic

An update for the virt:av and virt-devel:av modules is now available for Red Hat Enterprise Linux Advanced Virtualization 8.4.

Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The Advanced Virtualization module provides the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.

Security Fix(es):

• QEMU: block: fdc: null pointer dereference may lead to guest crash (CVE-2021-20196)

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):

• <hint-dedicated> should not require <cpu mode='host-passthrough'> (BZ#2034942)

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

Affected Products

• Red Hat Enterprise Linux Advanced Virtualization EUS 8.4 x86_64
• Red Hat Enterprise Linux Advanced Virtualization (for RHEL Server for IBM Power LE) EUS 8.4 ppc64le
• Red Hat Enterprise Linux Advanced Virtualization (for RHEL Server for IBM System Z) EUS 8.4 s390x

Fixes

• BZ - 1919210 - CVE-2021-20196 QEMU: block: fdc: null pointer dereference may lead to guest crash
• BZ - 2034942 - <hint-dedicated> should not require <cpu mode='host-passthrough'> [rhel-8.4.0.z]

CVEs

• CVE-2021-20196

References

• https://access.redhat.com/security/updates/classification/#low