CVE-2026-81642

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 digest buffer. Remote code execution is possible through attacker controlled data. An adversary can exploit the vulnerability by controlling a malicious zone and querying a vulnerable Unbound.

CVSS

No CVSS.

References

Link	Resource
https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-81642.txt

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-16 09:17

Updated : 2026-09-16 09:17

NVD link : CVE-2026-81642

Mitre link : CVE-2026-81642

CVE.ORG link : CVE-2026-81642

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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CVE-2026-81642

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