This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-19667 →

DEBIAN-CVE-2026-19667

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...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 bind9

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 bind9

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.29-1~deb13u1"}]}]

Debian:14 bind9

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.29-1"}]}]

References

advisory security-tracker.debian.org