CVE-2026-3119

Authenticated query containing a TKEY record may cause named to terminate unexpectedly

State: Published
Severity: 6.5 Medium
Published: Mar 25, 2026
Updated: Mar 25, 2026
Reserved: Feb 24, 2026

Description

Under certain conditions, `named` may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature (TSIG) from a key declared in the `named` configuration. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	isc

Weaknesses

CWE-617 Reachable Assertion

Affected Products

Product	Versions
BIND 9ISC	9.20.0 through 9.20.20Affected 9.21.0 through 9.21.19Affected 9.20.9-S1 through 9.20.20-S1Affected 9.18.0 through 9.18.46Not affected 9.18.11-S1 through 9.18.46-S1Not affected

References

CVE-2026-3119vendor-advisory
https://downloads.isc.org/isc/bind9/9.20.21patch
https://downloads.isc.org/isc/bind9/9.21.20patch

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