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RedHat 8.4 RHSA-2021-4112-01 Moderate: QEMU Memory Management

red hat
Calendar Grey November 3, 2021
Dist Redhat Esm H88
Essential security enhancement and patch rollout for Red Hat's virt:av and virt-devel:av components targeting CVE-2021-3748.
An update for the virt:av and virt-devel:av modules is now available for Red Hat Enterprise Linux Advanced Virtualization 8.4

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

Summary

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: virtio-net: heap use-after-free in virtio_net_receive_rcu (CVE-2021-3748)
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):
* qemu-img convert --bitmaps fail if a bitmap is inconsistent (BZ#1993308)
* fails to revert snapshot of a VM [balloon/page-poison] (BZ#2005425)
* Operation not permitted in setting unpriv_sgio for KubeVirt (BZ#2012223)

Topics%20covered

Topics Covered

security advisory moderate severity memory management RedHat QEMU virt:av virt-devel:av

References

https://access.redhat.com/security/cve/CVE-2021-3748 https://access.redhat.com/security/updates/classification/#moderate

Package List

Advanced Virtualization for RHEL 8.4.0.Z:
Source: SLOF-20200717-1.gite18ddad8.module+el8.4.0+8855+a9e237a9.src.rpm SLOF-20200717-1.gite18ddad8.module+el8.4.0+8855+a9e237a9.src.rpm hivex-1.3.18-21.module+el8.4.0+11609+2eba841a.src.rpm libguestfs-1.44.0-2.module+el8.4.0+10146+75917d2f.src.rpm libguestfs-winsupport-8.2-2.module+el8.4.0+12717+0b0da9ad.src.rpm libiscsi-1.18.0-8.module+el8.4.0+8855+a9e237a9.src.rpm libnbd-1.6.0-3.module+el8.4.0+9856+bbc47853.src.rpm libtpms-0.7.4-4.20201106git2452a24dab.module+el8.4.0+10596+32ba7df3.src.rpm libvirt-7.0.0-14.5.module+el8.4.0+13026+f38c77ab.src.rpm libvirt-dbus-1.3.0-2.module+el8.4.0+8855+a9e237a9.src.rpm libvirt-python-7.0.0-1.module+el8.4.0+9469+2eaf72bc.src.rpm nbdkit-1.24.0-1.module+el8.4.0+9341+96cf2672.src.rpm netcf-0.2.8-12.module+el8.4.0+8855+a9e237a9.src.rpm perl-Sys-Virt-7.0.0-1.module+el8.4.0+9469+2eaf72bc.src.rpm python-pyvmomi-6.7.1-7.module+el8.4.0+8855+a9e237a9.src.rpm qemu-kvm-5.2.0-16.module+el8.4.0+13043+9eb47245.11.src.rpm seabios-1.14.0-1.module+el8.4.0+8855+a9e237a9.src.rpm seabios-1.14.0-1.module+el8.4.0+8855+a9e237a9.src.rpm sgabios-0.20170427git-3.module+el8.4.0+8855+a9e237a9.src.rpm sgabios-0.20170427git-3.module+el8.4.0+8855+a9e237a9.src.rpm supermin-5.2.1-1.module+el8.4.0+9751+d56db353.src.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:4112-01
Product: Advanced Virtualization
Advisory URL: Issue date: 2021-11-03

Topic

An update for the virt:av and virt-devel:av modules is now available forRed Hat Enterprise Linux Advanced Virtualization 8.4.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate severity memory management RedHat QEMU virt:av virt-devel:av

Relevant Releases Architectures

Advanced Virtualization for RHEL 8.4.0.Z - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1993308 - qemu-img convert --bitmaps fail if a bitmap is inconsistent [rhel-8.4.0.z]

1998514 - CVE-2021-3748 QEMU: virtio-net: heap use-after-free in virtio_net_receive_rcu

2005425 - fails to revert snapshot of a VM [balloon/page-poison] [rhel-8.4.0.z]

2012223 - Operation not permitted in setting unpriv_sgio for KubeVirt [rhel-8.4.0.z]

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