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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-19630

Amplified resource exhaustion in inbound message processing

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Status
Published
Published
Updated
Assigning organization
isc

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ISC BIND 9

Default version status: unaffected

  • 9.11.0 to ≤ 9.18.50affected
  • 9.20.0 to ≤ 9.20.29affected
  • 9.21.0 to ≤ 9.21.26affected
  • 9.11.3-S1 to ≤ 9.18.50-S1affected
  • 9.20.9-S1 to ≤ 9.20.29-S1affected

References