CVE-2026-3119

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductIsc Bind

PublishedMar 25, 2026

First seenMar 25, 2026

Weakness typeCWE-617CWE-617

How to fix

Update

isc bind9.20.21, 9.21.20 or later

Patches

Vendor advisories

kb.isc.org/docs/cve-2026-3119

Affected products

Product	Affected versions	Fixed in
isc bind	9.20.0 ≤ v < 9.20.21, 9.21.0 ≤ v < 9.21.20	9.20.21, 9.21.20

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