Description

If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1.

INFO

Published Date :

2025-07-16T17:38:06.370Z

Last Modified :

2025-11-04T21:10:12.751Z

Source :

isc
AFFECTED PRODUCTS

The following products are affected by CVE-2025-40777 vulnerability.

Vendors Products
Isc
  • Bind
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-40777.

URL Resource
http://www.openwall.com/lists/oss-security/2025/07/16/6 cve-icon
https://kb.isc.org/docs/cve-2025-40777 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-40777 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-40777 cve-icon
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