USN-8833-1: libvirt vulnerabilities
Ubuntu patches libvirt flaws including CVE-2026-61477, letting local attackers with network-definition rights inject dnsmasq config and execute commands as root.
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Vulnerability3 · 1 read
CVE-2026-61477
- CVSS 3.1
- 2.3 low
- EPSS
- <1%p6
- Published
- ·
- Modified
Description · NVD
An injection vulnerability was found in libvirt's virtual network driver. The network XML parser does not strip newline characters from DNS TXT record value attributes and SRV record domain/target attributes. These values are written verbatim into the dnsmasq configuration file generated by the network driver, allowing a user with permission to define virtual networks to inject arbitrary dnsmasq configuration directives such as dhcp-script, leading to arbitrary command execution as root.
- Weakness
- CWE-93
- Vector
- CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N