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.
Published: 2026-08-07
Score: 2.3 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Tracking

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History

Sat, 08 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Libvirt
Libvirt libvirt
Redhat enterprise Linux For Nvidia 26
Vendors & Products Libvirt
Libvirt libvirt
Redhat enterprise Linux For Nvidia 26

Sat, 08 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Low


Fri, 07 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 07 Aug 2026 14:15:00 +0000

Type Values Removed Values Added
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.
Title Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection
First Time appeared Redhat
Redhat enterprise Linux
Redhat enterprise Linux Nvidia
Weaknesses CWE-93
CPEs cpe:/a:redhat:enterprise_linux_nvidia:
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat enterprise Linux Nvidia
References
Metrics cvssV3_1

{'score': 2.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N'}


Subscriptions

Libvirt Libvirt
Redhat Enterprise Linux Enterprise Linux For Nvidia 26 Enterprise Linux Nvidia
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-07T18:21:52.947Z

Reserved: 2026-07-09T16:18:42.859Z

Link: CVE-2026-61477

cve-icon Vulnrichment

Updated: 2026-08-07T18:21:48.858Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-07T14:17:00.187

Modified: 2026-08-14T19:07:46.080

Link: CVE-2026-61477

cve-icon Redhat

Severity : Low

Publid Date: 2026-08-06T14:16:37Z

Links: CVE-2026-61477 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-08T20:53:09Z

Weaknesses
  • CWE-93

    Improper Neutralization of CRLF Sequences ('CRLF Injection')