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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2025-40775

DNS message with invalid TSIG causes an assertion failure

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Status
Published
Published
Updated
Assigning organization
isc

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ISC BIND 9

Default version status: unaffected

  • 9.20.0 to ≤ 9.20.8affected
  • 9.21.0 to ≤ 9.21.7affected

References