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RHEL 8 RHSA-2022:5821-01 Moderate: Virt Module Memory Leak

red hat
Calendar Grey August 3, 2022
Dist Redhat Esm H88
Update protects RHEL 8 from moderate security issues in virt modules with multiple enhancements and bug fixes.
An update for the virt:rhel and virt-devel:rhel modules 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

Summary

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.
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):
* RHEL 9.0 guest with vsock device migration failed from RHEL 9.0 > RHEL 8.6 (BZ#2071103)
* Fail to rebuild the reference count tables of qcow2 image on host block devices (e.g. LVs) (BZ#2072242)
* Remove upstream-only devices from the qemu-kvm binary (BZ#2077928)
* When doing a cpu-baseline between skylake and cascadelake, cascadelake is selected as baseline. (BZ#2084030)
* Virt-v2v can't convert rhel8.6 guest from VMware on rhel8.6 (BZ#2093415)
Enhancement(s):
* Allow memory prealloc from multiple threads (BZ#2075569)

Topics%20covered

Topics Covered

security advisory buffer overflow bug fix moderate impact memory leak RHEL virt module

References

https://access.redhat.com/security/cve/CVE-2021-4206 https://access.redhat.com/security/cve/CVE-2021-4207 https://access.redhat.com/security/cve/CVE-2022-26353 https://access.redhat.com/security/cve/CVE-2022-26354 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: SLOF-20210217-1.module+el8.6.0+14480+c0a3aa0f.src.rpm hivex-1.3.18-23.module+el8.6.0+14480+c0a3aa0f.src.rpm libguestfs-1.44.0-5.module+el8.6.0+14480+c0a3aa0f.src.rpm libguestfs-winsupport-8.6-1.module+el8.6.0+14480+c0a3aa0f.src.rpm libiscsi-1.18.0-8.module+el8.6.0+14480+c0a3aa0f.src.rpm libnbd-1.6.0-5.module+el8.6.0+14480+c0a3aa0f.src.rpm libtpms-0.9.1-0.20211126git1ff6fe1f43.module+el8.6.0+14480+c0a3aa0f.src.rpm libvirt-8.0.0-5.2.module+el8.6.0+15256+3a0914fe.src.rpm libvirt-dbus-1.3.0-2.module+el8.6.0+14480+c0a3aa0f.src.rpm libvirt-python-8.0.0-1.module+el8.6.0+14480+c0a3aa0f.src.rpm nbdkit-1.24.0-4.module+el8.6.0+14480+c0a3aa0f.src.rpm netcf-0.2.8-12.module+el8.6.0+14480+c0a3aa0f.src.rpm perl-Sys-Virt-8.0.0-1.module+el8.6.0+14480+c0a3aa0f.src.rpm qemu-kvm-6.2.0-11.module+el8.6.0+15668+464a1f31.2.src.rpm seabios-1.15.0-2.module+el8.6.0+14757+c25ee005.src.rpm sgabios-0.20170427git-3.module+el8.6.0+14480+c0a3aa0f.src.rpm supermin-5.2.1-1.module+el8.6.0+14480+c0a3aa0f.src.rpm swtpm-0.7.0-1.20211109gitb79fd91.module+el8.6.0+14480+c0a3aa0f.src.rpm virt-v2v-1.42.0-19.module+el8.6.0+15577+2ffd6ffa.src.rpm
aarch64: hivex-1.3.18-23.module+el8.6.0+14480+c0a3aa0f.aarch64.rpm

Read the Full Advisory


Advisory ID: RHSA-2022:5821-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:5821
Issue date: 2022-08-02

Topic

An update for the virt:rhel and virt-devel:rhel modules is now availablefor Red Hat Enterprise Linux 8.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 buffer overflow bug fix moderate impact memory leak RHEL virt module

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, s390x, x86_64

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

Bugs Fixed

2036966 - CVE-2021-4207 QEMU: QXL: double fetch in qxl_cursor() can lead to heap buffer overflow

2036998 - CVE-2021-4206 QEMU: QXL: integer overflow in cursor_alloc() can lead to heap buffer overflow

2063197 - CVE-2022-26353 QEMU: virtio-net: map leaking on error during receive

2063257 - CVE-2022-26354 QEMU: vhost-vsock: missing virtqueue detach on error can lead to memory leak

2072242 - Fail to rebuild the reference count tables of qcow2 image on host block devices (e.g. LVs) [rhel-8.6.0.z]

2075569 - Allow memory prealloc from multiple threads [rhel-8.6.0.z]

2084030 - When doing a cpu-baseline between skylake and cascadelake, cascadelake is selected as baseline. [rhel-8.6.0.z]

2093415 - Virt-v2v can't convert rhel8.6 guest from VMware on rhel8.6 [rhel-8.6.0.z]

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