CVE-2026-61477

Name	CVE-2026-61477
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libvirt (PTS)	bookworm	9.0.0-4+deb12u2	vulnerable
	trixie	11.3.0-3+deb13u2	vulnerable
	forky	12.6.0-1	fixed
	sid	12.7.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libvirt	source	(unstable)	12.6.0-1

Notes

[trixie] - libvirt <no-dsa> (Minor issue)
[bookworm] - libvirt <postponed> (Minor issue)
Fixed by: https://gitlab.com/libvirt/libvirt/-/commit/d44836a1dc6771ac22f69755fc69bf730f0eec87 (v12.6.0-rc1)
Fixed by: https://gitlab.com/libvirt/libvirt/-/commit/289ffa796d737a79a4c05d07232ebd75def9a12a (v12.6.0-rc1)
Fixed by: https://gitlab.com/libvirt/libvirt/-/commit/cb8974b923e3c40cde96f0c7bceaa638f7f9c72b (v12.6.0-rc1)
Fixed by: https://gitlab.com/libvirt/libvirt/-/commit/3cfc77963b512d809348fca07f97fe924fac9a05 (v12.6.0-rc1)