CVE-2026-41292

Name
CVE-2026-41292
Description
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
sep@nlnetlabs.nl https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-41292.txt

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:* unbound >= None < 1.25.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
unbound edge-main 1.25.1-r0 Jakub Jirutka <jakub@jirutka.cz> fixed
unbound edge-main 1.25.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.24.2-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.24.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.24.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.24.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.23.1-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.23.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.23.0-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.23.0-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.23.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.22.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.21.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.20.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.19.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.19.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.16.3-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.16.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound edge-main 1.10.1-r0 None possibly vulnerable
unbound edge-main 1.9.5-r0 None possibly vulnerable
unbound edge-main 1.9.4-r0 None possibly vulnerable
unbound 3.23-main 1.24.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.22-main 1.23.1-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.22-main 1.23.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.22-main 1.23.0-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.22-main 1.21.1-r0 None possibly vulnerable
unbound 3.22-main 1.20.0-r0 None possibly vulnerable
unbound 3.22-main 1.19.2-r0 None possibly vulnerable
unbound 3.22-main 1.19.1-r0 None possibly vulnerable
unbound 3.22-main 1.16.3-r0 None possibly vulnerable
unbound 3.22-main 1.16.2-r0 None possibly vulnerable
unbound 3.22-main 1.10.1-r0 None possibly vulnerable
unbound 3.22-main 1.9.5-r0 None possibly vulnerable
unbound 3.22-main 1.9.4-r0 None possibly vulnerable
unbound 3.21-main 1.22.0-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.21-main 1.22.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.21-main 1.21.1-r0 None possibly vulnerable
unbound 3.21-main 1.20.0-r0 None possibly vulnerable
unbound 3.21-main 1.19.2-r0 None possibly vulnerable
unbound 3.21-main 1.19.1-r0 None possibly vulnerable
unbound 3.21-main 1.16.3-r0 None possibly vulnerable
unbound 3.21-main 1.16.2-r0 None possibly vulnerable
unbound 3.21-main 1.10.1-r0 None possibly vulnerable
unbound 3.21-main 1.9.5-r0 None possibly vulnerable
unbound 3.21-main 1.9.4-r0 None possibly vulnerable
unbound 3.20-main 1.20.0-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.20-main 1.20.0-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.20-main 1.20.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.20-main 1.19.2-r0 None possibly vulnerable
unbound 3.20-main 1.19.1-r0 None possibly vulnerable
unbound 3.20-main 1.16.3-r0 None possibly vulnerable
unbound 3.20-main 1.16.2-r0 None possibly vulnerable
unbound 3.20-main 1.10.1-r0 None possibly vulnerable
unbound 3.20-main 1.9.5-r0 None possibly vulnerable
unbound 3.20-main 1.9.4-r0 None possibly vulnerable
unbound 3.19-main 1.20.0-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.19-main 1.20.0-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.19-main 1.20.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.19-main 1.19.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.19-main 1.19.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.19-main 1.16.3-r0 None possibly vulnerable
unbound 3.19-main 1.16.2-r0 None possibly vulnerable
unbound 3.19-main 1.10.1-r0 None possibly vulnerable
unbound 3.19-main 1.9.5-r0 None possibly vulnerable
unbound 3.19-main 1.9.4-r0 None possibly vulnerable