high7.5
CVE-2025-40775
When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it.
Impact
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
| Product | Affected versions |
|---|---|
| BIND 9 Versions 9.20.0 | through 9.20.8 |
| 9.21.0 | through 9.21.7. |
Versions were read from the advisory text. No structured product data has been published for this record yet.