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Vulnerability record · CVE-2026-12725 · published 22 June 2026

CVE-2026-12725: Redhat openshift container platform heap-based buffer overflow vulnerability

Redhat · Openshift Container Platform

A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause dnsmasq to write past the end of an internal logging buffer. A remote attacker able to supply such a DNS response may crash the dnsmasq process, resulting in denial of service.

5.9 CVSS 3.1 Medium EPSS 0.53% · top 57.6% CWE-122 · Heap-based buffer overflow
5.9CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
31 Aug 2026Last modified by NVD

Description

A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause dnsmasq to write past the end of an internal logging buffer. A remote attacker able to supply such a DNS response may crash the dnsmasq process, resulting in denial of service.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-12725 MitigationVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2490763 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-12725), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.