# DSA-5439-1: bind9 security update

DSA-5439-1, released June 25, 2023, fixes 1 CVE in bind9. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/dsa-5439-1
- Platform: Linux
- Released: Jun 25, 2023
- Priority: High (Closes CVE-2023-2828, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2023-2828

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bind9](https://patchblox.com/security/data/product/linux/bind9.md) | Debian 11.6 (bullseye) | 1:9.16.42-1~deb11u1 |
| [bind9](https://patchblox.com/security/data/product/linux/bind9.md) | Debian 12.15 (bookworm) | 1:9.18.16-1~deb12u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-2828](https://patchblox.com/security/data/cve/CVE-2023-2828.md) | High | bind9: Every `named` instance configured to run as a recursive resolver maintainsa cache database holding the responses to t... | 7.5 | 0.0370 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo