Red Hat Enterprise Linux/OpenShift Container Platform NSEC NSEC3 Bitmap Parsing infinite loop

Summaryinfo

A vulnerability, which was classified as critical, has been found in Red Hat Enterprise Linux and OpenShift Container Platform. Affected by this vulnerability is an unknown functionality of the component NSEC NSEC3 Bitmap Parsing. Performing a manipulation results in infinite loop. This vulnerability is reported as CVE-2026-13002. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Red Hat Enterprise Linux and OpenShift Container Platform (affected version unknown). This affects an unknown functionality of the component NSEC NSEC3 Bitmap Parsing. The manipulation with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability. The summary by CVE is:

A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-13002 since 06/23/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/14/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

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
• OpenShift Container Platform

License

• commercial

Website

• Vendor: https://www.redhat.com/

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