CVE-2025-40777

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Source
https://cve.org/CVERecord?id=CVE-2025-40777
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40777.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-40777
Downstream
Related
Published
2025-07-16T18:15:24Z
Modified
2026-04-10T05:26:25.711189Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages