CVE-2025-40775 – BIND DNS Invalid TSIG Algorithm Field Vulnerability

CVE ID : CVE-2025-40775

Published : May 21, 2025, 1:16 p.m. | 1 hour, 56 minutes ago

Description : When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure.
This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.

Severity: 7.5 | HIGH

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