CVE-2026-19630
High
Description
In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Microsoft Azl3 Bind
PublishedOct 21, 2026
First seenOct 21, 2026
Weakness typeCWE-407CWE-407
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft azl3_bind_9.20.26-1 | No range specified | — |
| microsoft azl3_bind_9.20.29-1 | No range specified | — |
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