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CVE-2025-40775

DNS message with invalid TSIG causes an assertion failure

CVSS 7.5 HIGHEPSS 10.8%CWE-232
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Produtos afetados
ISC · BIND 9

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Referências
https://kb.isc.org/docs/cve-2025-40775https://security.netapp.com/advisory/ntap-20250523-0001/http://www.openwall.com/lists/oss-security/2025/05/21/1