9.1
Critical
CVE-2026-81642 In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in the DNSSEC validator that enables…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| unbound 1.26 | earliest → < 1.26.1 | 1.26.1 |
References
- www.nlnetlabs.nl www.nlnetlabs.nl
Timeline
- Published
- Last modified
Other CVEs of unbound
The 58 CVEs of unbound →
CVE-2026-97206
NLnet Labs Unbound, 1.22.0 up to and including version 1.26.1, contains a DNS-over-QUIC (DoQ) lifetime bug reachable…
7.5
High
CVE-2026-96405
NLnet Labs Unbound up to and including version 1.26.1 limits compression-pointer traversal for each individual…
5.3
Medium
CVE-2026-50106
When NLnet Labs Unbound up to and including version 1.26.1 is configured with both a root trust anchor and an additional…
6.5
Medium
CVE-2026-35501
When NLnet Labs Unbound 1.0.1 up to and including version 1.26.1 is configured with both a root trust anchor and an…
3.7
Low