CVE-2026-4891
Public on 2026-05-11
Modified on 2026-05-12
Description
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Dnsmasq Extra | dnsmasq | Pending Fix | ||
| Amazon Linux 2 - Core | dnsmasq | Not Affected | ||
| Amazon Linux 2023 | dnsmasq | Pending Fix |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |