CVE-2026-81642

CVE-2026-81642 — Unbound DNSKEY digest heap overflow tracking site Source for the CVE-2026-81642 patch-status tracker: a single-page site recording which distributions have shipped a fix for the Unbound DNSSEC validator heap overflows and the ReTrap complexity attacks disclosed alongside them...

Unbound 1.26.0 DNSKEY Digest Heap Overflow

Unbound version 1.26.0 and earlier contains a heap buffer overflow in DNSKEY digest processing. The supplied tracker documents affected versions, upstream 1.26.1 remediation, and distribution patch status...

Exploit for CVE-2026-81642

CVE-2026-81642 — Unbound DNSKEY digest heap overflow tracking...

Critical: unbound

Issue Overview: In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in the DNSSEC validator that enables denial of service and possible remote code execution as a result of digesting DNSKEYs. A DNSKEY with an owner compression pointer to its own RDATA can overflow the dige...

PT-2026-93373

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions prior to 1.26.1 Description A heap-based buffer overflow exists in the DNSSEC validator of the Unbound DNS resolver. The issue occurs during the preparation of a DNSKEY digest within the ds create dnskey digest...