Amazon Linux 2023 Security Advisory: ALAS2023-2026-1516
Advisory Released Date: 2026-05-14
Advisory Updated Date: 2026-06-08
Severity:
Medium
Issue Overview:
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. (CVE-2026-2291)
Affected Packages:
dnsmasq
Issue Correction:
Run dnf update dnsmasq --releasever 2023.11.20260511 or dnf update --advisory ALAS2023-2026-1516 --releasever 2023.11.20260511 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
dnsmasq-debugsource-2.90-1.amzn2023.0.2.aarch64
dnsmasq-utils-2.90-1.amzn2023.0.2.aarch64
dnsmasq-utils-debuginfo-2.90-1.amzn2023.0.2.aarch64
dnsmasq-debuginfo-2.90-1.amzn2023.0.2.aarch64
dnsmasq-2.90-1.amzn2023.0.2.aarch64
src:
dnsmasq-2.90-1.amzn2023.0.2.src
x86_64:
dnsmasq-debuginfo-2.90-1.amzn2023.0.2.x86_64
dnsmasq-utils-debuginfo-2.90-1.amzn2023.0.2.x86_64
dnsmasq-utils-2.90-1.amzn2023.0.2.x86_64
dnsmasq-debugsource-2.90-1.amzn2023.0.2.x86_64
dnsmasq-2.90-1.amzn2023.0.2.x86_64
Changelog:
2026-06-08: CVE-2026-2291 was added to this advisory.