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Medium ALAS2023-2026-1516 1 CVE

Moderate: dnsmasq security update (Amazon Linux 2023)

Published Mar 30, 2026 · Updated Jun 8, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-2291: dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.

Fixed packages 5

ReleasePackageFixed in
Amazon Linux · 2023 dnsmasq 0:2.90-1.amzn2023.0.2
Amazon Linux · 2023 dnsmasq-debuginfo 0:2.90-1.amzn2023.0.2
Amazon Linux · 2023 dnsmasq-debugsource 0:2.90-1.amzn2023.0.2
Amazon Linux · 2023 dnsmasq-utils 0:2.90-1.amzn2023.0.2
Amazon Linux · 2023 dnsmasq-utils-debuginfo 0:2.90-1.amzn2023.0.2

Vulnerabilities 1

  • High 7.3
    CVE-2026-2291 Public exploit

    CVE-2026-2291

    dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.

    dnsmasq dnsmasq dnsmasq dnsmasq Debian Ubuntu Azure Linux Alpine Wolfi

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-2291.html