# dnsmasq-base-lua 2.90-0ubuntu0.18.04.1+esm1: dnsmasq-base-lua 2.90-0ubuntu0.18.04.1+esm1 for Ubuntu 18.04.6 LTS (bionic)

dnsmasq-base-lua 2.90-0ubuntu0.18.04.1+esm1, released January 16, 2026, fixes 4 CVEs in dnsmasq-base-lua. 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-bionic-dnsmasq-base-lua-2.90-0ubuntu0.18.04.1-esm1
- Platform: Linux
- Released: Jan 16, 2026
- Priority: High (Closes CVE-2023-50387, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [dnsmasq-base-lua](https://patchblox.com/security/data/product/linux/dnsmasq-base-lua.md) | Ubuntu 18.04.6 LTS (bionic) | 2.90-0ubuntu0.18.04.1+esm1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-50387](https://patchblox.com/security/data/cve/CVE-2023-50387.md) | High | MITRE: CVE-2023-50387 DNSSEC verification complexity can be exploited to exhaust CPU resources and stall DNS resolvers | 7.5 | 0.9999 |  |
| [CVE-2023-50868](https://patchblox.com/security/data/cve/CVE-2023-50868.md) | High | MITRE: CVE-2023-50868 NSEC3 closest encloser proof can exhaust CPU | 7.5 | 0.7430 | Disclosed |
| [CVE-2023-49441](https://patchblox.com/security/data/cve/CVE-2023-49441.md) | High | dnsmasq: dnsmasq 2.9 is vulnerable to Integer Overflow via forward_query. | 7.5 | 0.0066 |  |
| [CVE-2020-37127](https://patchblox.com/security/data/cve/CVE-2020-37127.md) | Routine | dnsmasq: Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to ca... | n/a | 0.0021 |  |

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Data as of 2026-11-12T13:55:20Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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