iterator.c in NLnet Labs Unbound before 1.5.1 does not limit delegation chaining, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a large or infinite number of referrals.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade unbound | Jul 30, 2024 | Dec 11, 2014 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Jun 4, 2015 |
| Freebsd | — | Upgrade FreeBSDUpgrade unbound | Dec 10, 2025 | Dec 9, 2014 |
| Oracle_linux | — | Upgrade unbound-develUpgrade unboundUpgrade unbound-libsUpgrade unbound-python | Oct 16, 2024 | Dec 11, 2014 |
| Suse | — | Upgrade unbound-develUpgrade unbound-anchorUpgrade libunbound2 | Dec 18, 2015 | Dec 10, 2014 |
| Ubuntu | — | Upgrade libunbound2Upgrade unbound | Nov 8, 2024 | Dec 11, 2014 |
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