A libvirt security update has been released for Ubuntu Linux 22.04 LTS, 22.10, and 23.04.

[USN-6126-1] libvirt vulnerabilities

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Ubuntu Security Notice USN-6126-1
May 31, 2023

libvirt vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.10
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in libvirt.

Software Description:
- libvirt: Libvirt virtualization toolkit

Details:

It was discovered that libvirt incorrectly handled the nwfilter driver. A
local attacker could possibly use this issue to cause libvirt to crash,
resulting in a denial of service. This issue only affected Ubuntu 22.04
LTS. (CVE-2022-0897)

It was discovered that libvirt incorrectly handled queries for the SR-IOV
PCI device capabilities. A local attacker could possibly use this issue to
cause libvirt to consume resources, leading to a denial of service.
(CVE-2023-2700)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.04:
libvirt-daemon 9.0.0-2ubuntu1.1
libvirt-daemon-system 9.0.0-2ubuntu1.1
libvirt0 9.0.0-2ubuntu1.1

Ubuntu 22.10:
libvirt-daemon 8.6.0-0ubuntu3.2
libvirt-daemon-system 8.6.0-0ubuntu3.2
libvirt0 8.6.0-0ubuntu3.2

Ubuntu 22.04 LTS:
libvirt-daemon 8.0.0-1ubuntu7.5
libvirt-daemon-system 8.0.0-1ubuntu7.5
libvirt0 8.0.0-1ubuntu7.5

After a standard system update you need to reboot your computer to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6126-1
CVE-2022-0897, CVE-2023-2700

Package Information:
https://launchpad.net/ubuntu/+source/libvirt/9.0.0-2ubuntu1.1
https://launchpad.net/ubuntu/+source/libvirt/8.6.0-0ubuntu3.2
https://launchpad.net/ubuntu/+source/libvirt/8.0.0-1ubuntu7.5