CVE-2026-3119: ISC BIND

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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 (fixed in 9.20.21); from 9.21.0, before 9.21.20 (fixed in 9.21.20)

Published 2026-03-25. Last modified 2026-06-17.