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Details of issue NIXPKGS-2026-2375

NIXPKGS-2026-2375
published 8 hours ago
Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection
Permalink CVE-2026-61477
2.3 LOW
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Local (L)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): High (H)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): Low (L)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Local (L)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): High (H)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): Low (L)
  • Modified Availability (MA): None (N)
updated 8 hours ago by @LeSuisse Activity log
  • Created suggestion 2 days, 18 hours ago
  • @LeSuisse ignored
    14 packages
    • libvirt-dbus
    • libvirt-glib
    • python313Packages.libvirt
    • rubyPackages.ruby-libvirt
    • ocamlPackages.ocaml_libvirt
    • prometheus-libvirt-exporter
    • terraform-providers.libvirt
    • rubyPackages_3_3.ruby-libvirt
    • rubyPackages_3_4.ruby-libvirt
    • rubyPackages_4_0.ruby-libvirt
    • python313Packages.libvirt-python
    • python314Packages.libvirt-python
    • ocamlPackages_latest.ocaml_libvirt
    • terraform-providers.dmacvicar_libvirt
    8 hours ago
  • @LeSuisse restored package python313Packages.libvirt-python 8 hours ago
  • @LeSuisse ignored
    2 packages
    • python313Packages.libvirt-python
    • python314Packages.libvirt
    8 hours ago
  • @LeSuisse accepted 8 hours ago
  • @LeSuisse published on GitHub 8 hours ago
Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection

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.

Affected products

libvirt
virt:rhel/libvirt

Matching in nixpkgs

pkgs.libvirt

Toolkit to interact with the virtualization capabilities of recent versions of Linux and other OSes

Ignored packages (15)

pkgs.libvirt-glib

Wrapper library of libvirt for glib-based applications

Package maintainers

Fixed in 12.6.0