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

The following table lists the changes that have been made to the
CVE-2025-40775 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • CVE Modified
    by af854a3a-2127-422b-91ae-364da2661108

    May. 21, 2025

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2025/05/21/1
  • New CVE Received
    by [email protected]

    May. 21, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-232
    Added Reference https://kb.isc.org/docs/cve-2025-40775
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