Riskcovery

CVE-2026-61477

Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection

State
Published
Severity
2.3 Low
Published
Aug 7, 2026
Updated
Aug 7, 2026
Reserved
Jul 9, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.12.3 LowCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:Nredhat

Weaknesses

  • CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

Affected Products

ProductVersions
Red Hat Enterprise Linux 10Red Hat
    Red Hat Enterprise Linux 6Red Hat
      Red Hat Enterprise Linux 7Red Hat
        Red Hat Enterprise Linux 8Red Hat
          Red Hat Enterprise Linux 9Red Hat
            Red Hat Enterprise Linux for NVIDIA 26Red Hat

              References

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