Red Hat Enterprise Linux Network XML Parser code injection

Summaryinfo

A vulnerability described as very critical has been identified in Red Hat Enterprise Linux. Affected by this issue is some unknown functionality of the component Network XML Parser. Such manipulation leads to code injection. This vulnerability is traded as CVE-2026-61477. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux (unknown version) and classified as very critical. Affected by this issue is an unknown code block of the component Network XML Parser. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at access.redhat.com. This vulnerability is handled as CVE-2026-61477 since 07/09/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/07/2026). This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

License

• commercial

Website

• Vendor: https://www.redhat.com/

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