CVE-2026-19668
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
A BIND recursive resolver may experience excessive resource consumption if it encounters large numbers of a particular kind of invalid DNSSEC record. Default limits on "max-records-per-type" and "max-types-per-name" help mitigate the exposure. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ISC | BIND 9 | 9.11.0 <= 9.18.50 | affected |
| ISC | BIND 9 | 9.20.0 <= 9.20.27 | affected |
| ISC | BIND 9 | 9.21.0 <= 9.21.25 | affected |
| ISC | BIND 9 | 9.11.3-S1 <= 9.18.50-S1 | affected |
| ISC | BIND 9 | 9.20.9-S1 <= 9.20.27-S1 | affected |
Weaknesses
- CWE-407: CWE-407 Inefficient Algorithmic Complexity
Workarounds
No workarounds known.
References
- https://kb.isc.org/docs/cve-2026-19668
- https://downloads.isc.org/isc/bind9/9.20.29
- https://downloads.isc.org/isc/bind9/9.21.26
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