# bind9utils 1:9.18.30-0ubuntu0.20.04.2+esm3: bind9utils 1:9.18.30-0ubuntu0.20.04.2+esm3 for Ubuntu 20.04 LTS (focal)

bind9utils 1:9.18.30-0ubuntu0.20.04.2+esm3, released September 16, 2026, fixes 20 CVEs in bind9utils. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-focal-bind9utils-1-9.18.30-0ubuntu0.20.04.2-esm3
- Platform: Linux
- Released: Sep 16, 2026
- Priority: High (Closes CVE-2026-1519, high severity)
- CVEs: 20, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bind9utils](https://patchblox.com/security/data/product/linux/bind9utils.md) | Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-1519](https://patchblox.com/security/data/cve/CVE-2026-1519.md) | High | Excessive NSEC3 iterations cause high CPU load during insecure delegation validation | 7.5 | 0.0172 |  |
| [CVE-2026-19666](https://patchblox.com/security/data/cve/CVE-2026-19666.md) | High | Use-after-free in query_addnoqnameproof() via the DNS64 filter64 path | 7.5 | 0.0057 |  |
| [CVE-2026-19667](https://patchblox.com/security/data/cve/CVE-2026-19667.md) | High | Remote assertion failure via 16-bit length truncation in `dns_ncache_add()` | 7.5 | 0.0057 |  |
| [CVE-2026-80274](https://patchblox.com/security/data/cve/CVE-2026-80274.md) | High | Validating resolver can abort while caching a mismatched NOQNAME proof | 7.5 | 0.0057 |  |
| [CVE-2026-81563](https://patchblox.com/security/data/cve/CVE-2026-81563.md) | High | SVCB AliasMode additional-data error leaks qpcache references | 7.5 | 0.0057 |  |
| [CVE-2026-81736](https://patchblox.com/security/data/cve/CVE-2026-81736.md) | High | bind9.18: Set limit to following HTTPS/SVCB aliases | 7.5 | 0.0057 |  |
| [CVE-2026-11622](https://patchblox.com/security/data/cve/CVE-2026-11622.md) | High | Potential memory usage beyond configured limits | 8.6 | 0.0054 |  |
| [CVE-2026-13204](https://patchblox.com/security/data/cve/CVE-2026-13204.md) | High | Unexpected exit in certain situations with NSEC and NSEC3 both present | 8.6 | 0.0052 |  |
| [CVE-2026-19662](https://patchblox.com/security/data/cve/CVE-2026-19662.md) | High | qpcache NOQNAME proof use-after-free crashes recursive resolver | 8.1 | 0.0046 |  |
| [CVE-2026-11331](https://patchblox.com/security/data/cve/CVE-2026-11331.md) | High | Potential wildcard CNAME RPZ policy bypass | 8.6 | 0.0043 |  |
| [CVE-2026-11721](https://patchblox.com/security/data/cve/CVE-2026-11721.md) | High | Cache poisoning possible with label count discrepancy, RRSIG, and wildcards | 8.6 | 0.0040 |  |
| [CVE-2026-10723](https://patchblox.com/security/data/cve/CVE-2026-10723.md) | High | Incorrect acceptance of NSEC3 records | 8.6 | 0.0027 |  |
| [CVE-2026-13321](https://patchblox.com/security/data/cve/CVE-2026-13321.md) | High | DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field | 8.6 | 0.0022 |  |
| [CVE-2026-19668](https://patchblox.com/security/data/cve/CVE-2026-19668.md) | Routine | Resource Exhaustion via Excessive DNSSEC Cryptographic Material Matching | 5.3 | 0.0048 |  |
| [CVE-2026-75029](https://patchblox.com/security/data/cve/CVE-2026-75029.md) | Routine | libdns-export1100: In a query response, an attacker may send `named` multiple copies of a record that should only exist once (such as an... | 5.3 | 0.0048 |  |
| [CVE-2026-10822](https://patchblox.com/security/data/cve/CVE-2026-10822.md) | Routine | Key Record using PRIVATEDNS algorithm may lead to unexpected exit | 6.5 | 0.0042 |  |
| [CVE-2026-19033](https://patchblox.com/security/data/cve/CVE-2026-19033.md) | Routine | bind9: For a secondary zone with transfers restricted by TSIG, `named` may start to serve the data provided in a zone transf... | 6.5 | 0.0024 |  |
| [CVE-2026-19941](https://patchblox.com/security/data/cve/CVE-2026-19941.md) | Routine | checkwildcard() accepts an out-of-zone NSEC as a wildcard-nonexistence proof | 5.9 | 0.0023 |  |
| [CVE-2026-77119](https://patchblox.com/security/data/cve/CVE-2026-77119.md) | Routine | bind9: A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure de... | 5.9 | 0.0023 |  |
| [CVE-2026-78301](https://patchblox.com/security/data/cve/CVE-2026-78301.md) | Routine | Out-of-zone database nodes can become authoritative zone cuts | 5.8 | 0.0021 |  |

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Data as of 2026-11-13T14:02:24Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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