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High severity7.5NVD Advisory· Published Oct 21, 2026

CVE-2026-19630

CVE-2026-19630

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

1
  • Isc/Bindllm-fuzzy
    Range: 9.11.0 - 9.18.50, 9.20.0 - 9.20.29, 9.21.0 - 9.21.26, 9.11.3-S1 - 9.18.50-S1, 9.20.9-S1 - 9.20.29-S1

Patches

Vulnerability mechanics

References

3

News mentions

0

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