Reachable Assertion Affecting bind-dnssec-utils package, versions <32:9.18.50-1.amzn2023.0.2


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.49% (40th percentile)

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  • Snyk IDSNYK-AMZN2023-BINDDNSSECUTILS-18530976
  • published5 Aug 2026
  • disclosed22 Jul 2026

Introduced: 22 Jul 2026

NewCVE-2026-12617  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 bind-dnssec-utils to version 32:9.18.50-1.amzn2023.0.2 or higher.
This issue was patched in ALAS2023-2026-2040.

NVD Description

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

The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative server responds positively to the A query but delays the DNAME response and later responds negatively, named may quit unexpectedly. Or, if a client queries for a CNAME and A record for the same name to the resolver, and the authoritative server responds positively to the A query but delays the CNAME response and later responds with a self-referential CNAME, the same failure may occur. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

CVSS Base Scores

version 3.1