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Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows remote DNS servers to cause a denial of service (daemon crash) via a crafted response.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade unbound | Jul 30, 2024 | Dec 20, 2011 |
| Freebsd | — | Upgrade unbound | Dec 10, 2025 | Dec 19, 2011 |
| Gentoo Linux | — | Upgrade net-dns/unbound. | Oct 30, 2017 | Dec 20, 2011 |
| Ubuntu | — | Upgrade unbound | Nov 19, 2024 | Dec 20, 2011 |
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