RHSA-2026:98132: Important: ldns security update
The ldns packages contain a library with the aim to simplify DNS programming in C. All low-level DNS/DNSSEC operations are supported. We also define a higher level API which allows a programmer to (for instance) create or sign packets.Security Fix(es): ldns: ldns: Off-path poisoning attacks due to insufficient query-response matching (CVE-2026-10846) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/ldnsto a version that resolves this vulnerability.Fixed in 1.7.0-21.el8_8.1 - Upgrade
Upgrade
redhat/ldns-debuginfoto a version that resolves this vulnerability.Fixed in 1.7.0-21.el8_8.1 - Upgrade
Upgrade
redhat/ldns-debugsourceto a version that resolves this vulnerability.Fixed in 1.7.0-21.el8_8.1 - Upgrade
Upgrade
redhat/ldns-utils-debuginfoto a version that resolves this vulnerability.Fixed in 1.7.0-21.el8_8.1 - Upgrade
Upgrade
redhat/perl-ldns-debuginfoto a version that resolves this vulnerability.Fixed in 1.7.0-21.el8_8.1 - Upgrade
Upgrade
redhat/python3-ldns-debuginfoto a version that resolves this vulnerability.Fixed in 1.7.0-21.el8_8.1
Event History
Frequently Asked Questions
Which deployed systems are most relevant to this issue?
Systems using the Red Hat ldns library are the primary concern, especially applications that perform DNS or DNSSEC operations through ldns. The advisory also lists ldns utilities and language bindings through their associated debug packages, but it does not identify specific affected applications or configurations.
What type of attacker capability is involved?
The issue is described as enabling off-path poisoning attacks because query-response matching is insufficient. The provided information does not state additional prerequisites, such as network position, authentication requirements, or configuration conditions.
How can I determine whether my environment is affected?
Check whether Red Hat ldns packages are installed and whether local applications use ldns for DNS or DNSSEC processing. The advisory does not provide affected package versions, fixed versions, or detection indicators.