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

标题

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

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

描述

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: QXL: integer overflow in cursor_alloc() can lead to heap buffer overflow (CVE-2021-4206)
• QEMU: QXL: double fetch in qxl_cursor() can lead to heap buffer overflow (CVE-2021-4207)
• QEMU: virtio-net: map leaking on error during receive (CVE-2022-26353)
• QEMU: vhost-vsock: missing virtqueue detach on error can lead to memory leak (CVE-2022-26354)

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):

• Remove '\n' from vhostuser ifname [rhel-av-8.4.z] (BZ#2077923)
• When doing a cpu-baseline between skylake and cascadelake, cascadelake is selected as baseline. (BZ#2084031)

解决方案

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

受影响的产品

• 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

修复

• BZ - 2036966 - CVE-2021-4207 QEMU: QXL: double fetch in qxl_cursor() can lead to heap buffer overflow
• BZ - 2036998 - CVE-2021-4206 QEMU: QXL: integer overflow in cursor_alloc() can lead to heap buffer overflow
• BZ - 2063197 - CVE-2022-26353 QEMU: virtio-net: map leaking on error during receive
• BZ - 2063257 - CVE-2022-26354 QEMU: vhost-vsock: missing virtqueue detach on error can lead to memory leak
• BZ - 2077923 - Remove '\n' from vhostuser ifname [rhel-av-8.4.z]
• BZ - 2084031 - When doing a cpu-baseline between skylake and cascadelake, cascadelake is selected as baseline. [rhel-8.4.0.z]

CVE

• CVE-2021-4206
• CVE-2021-4207
• CVE-2022-26353
• CVE-2022-26354

参考

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