Bug 2535432 (CVE-2026-81736) - CVE-2026-81736 bind: BIND 9: Remote Denial of Service via cached SVCB/HTTPS AliasMode records
Summary: CVE-2026-81736 bind: BIND 9: Remote Denial of Service via cached SVCB/HTTPS A...
Keywords:
Status: NEW
Alias: CVE-2026-81736
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2535877
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-16 13:58 UTC by OSIDB Bzimport
Modified: 2026-09-17 08:52 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-09-16 13:58:55 UTC 
If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response.
This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
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