🛡️ CVE-2026-4890 on Alpine — dnsmasq

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

Distribution advisory

This page covers CVE-2026-4890 as tracked by Alpine, for the package dnsmasq. The fix is available in version 2.92_p2-r0; 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 and timeline

Affected software: dnsmasq (fixed in 2.92_p2-r0). Published on 11 May 2026 and last revised on 15 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security.alpinelinux.org (Advisory)

CVE-2026-4890 on other distributions

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

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 2026-05-11
Updated 2026-08-11
Modified 2026-06-15
Fix URL N/A

Affected Packages

Software From version Fixed in
dnsmasq — 2.92_p2-r0

Similar Threats

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More ALPINE CVE 2026 advisories

Part of ALPINE CVE 2026 in the advisory index.