Bug 2535457 (CVE-2026-19941) - CVE-2026-19941 bind9: bind: BIND 9: DNS wildcard record existence can be masked by an attacker via inapplicable NSEC records
Summary: CVE-2026-19941 bind9: bind: BIND 9: DNS wildcard record existence can be mask...
Keywords:
Status: NEW
Alias: CVE-2026-19941
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2535869
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-16 14:21 UTC by OSIDB Bzimport
Modified: 2026-09-17 08:50 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-16 14:21:08 UTC 
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record.
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.
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