Bug 2535445 (CVE-2026-19662) - CVE-2026-19662 bind9: bind: BIND 9: Denial of Service via crafted DNSSEC responses
Summary: CVE-2026-19662 bind9: bind: BIND 9: Denial of Service via crafted DNSSEC resp...
Keywords:
Status: NEW
Alias: CVE-2026-19662
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:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-16 14:11 UTC by OSIDB Bzimport
Modified: 2026-09-16 17:55 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-16 14:11:06 UTC 
An attacker may be able to cause a `named` resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, and those answers arrive in a particular order with particular timing, the `named` resolver will encounter a use-after-free bug, and abort.
This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
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