🛡️ CVE-2023-28450 on Debian — dnsmasq

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.

Distribution advisory

This page covers CVE-2023-28450 as tracked by Debian, for the package dnsmasq. The fix is available in version 2.90-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

DEBIAN-CVE-2023-28450 is recorded against 1 package.

dnsmasq (fixed in 2.90-1)

Timeline and source

Published on 15 March 2023 and last revised on 7 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2023-28450 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Alpine Base record Ubuntu

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2023-03-15

Updated 2026-08-20

Modified 2026-08-07

Fix URL N/A

Affected Packages

Software	From version	Fixed in
dnsmasq	—	2.90-1

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2023-28450

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