Security Advisory

CVE-2026-19667

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-09-16 13:46:56

Last updated 2026-09-17 18:45:36

Assigner isc

CVSS score 7.5

State PUBLISHED

Description

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in `named` results in a negative cache entry of 0 bytes. When this entry is subsequently read, `named` aborts. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

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