Incorrect Calculation of Buffer Size Affecting dnsmasq-utils-debuginfo package, versions <0:2.90-1.amzn2023.0.2


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.61% (47th percentile)

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  • Snyk IDSNYK-AMZN2023-DNSMASQUTILSDEBUGINFO-16708744
  • published16 May 2026
  • disclosed11 May 2026

Introduced: 11 May 2026

CVE-2026-2291  (opens in a new tab)
CWE-131  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 dnsmasq-utils-debuginfo to version 0:2.90-1.amzn2023.0.2 or higher.
This issue was patched in ALAS2023-2026-1516.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dnsmasq-utils-debuginfo package and not the dnsmasq-utils-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1