What’s Vulnerable › Vulnerabilities

CVE-2026-3119: Authenticated query containing a TKEY record may cause named to terminate unexpectedly

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-25 · updated 2026-06-17
• Weakness: CWE-617

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.

Affected products

• ISC BIND: from 9.20.0 before 9.20.21; from 9.21.0 before 9.21.20 — fixed in 9.20.21, 9.21.20

How to fix

Upgrade to a fixed version: ISC BIND 9.20.21, 9.21.20. Check the vendor advisory for mitigations.

References

• https://downloads.isc.org/isc/bind9/9.20.21
• https://downloads.isc.org/isc/bind9/9.21.20
• https://kb.isc.org/docs/cve-2026-3119

Get alerted when CVE-2026-3119 or the next vulnerability affects your stack