Bug 2504370 (CVE-2026-12617) - CVE-2026-12617 bind: bind9: Record ordering based unexpected exit with CNAME or DNAME
Summary: CVE-2026-12617 bind: bind9: Record ordering based unexpected exit with CNAME ...
Keywords:
Status: NEW
Alias: CVE-2026-12617
Deadline: 2026-07-22
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:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-21 20:35 UTC by OSIDB Bzimport
Modified: 2026-08-31 13:31 UTC (History)
20 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-07-21 20:35:01 UTC 
Specific CNAME/DNAME + A record query ordering with delayed
authoritative responses can cause an assertion exit. Requires
specific timing of authoritative server responses.
Comment 2 Petr Menšík 2026-08-04 08:55:56 UTC 
It seems that this CVE does not affect our older version. Because at least described way to trigger requires change we do not yet have in our released versions. That was added in version 9.18.36, 3 minor versions before our latest 9.18 version. Fedor has commented more details in issue RHEL-213450.
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