Bug 2559128 (CVE-2026-114605) - CVE-2026-114605 dnspython: dnspython: Denial of Service via excessive DNS compression pointer traversal
Summary: CVE-2026-114605 dnspython: dnspython: Denial of Service via excessive DNS com...
Keywords:
Status: NEW
Alias: CVE-2026-114605
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-22 16:43 UTC by OSIDB Bzimport
Modified: 2026-11-03 20:26 UTC (History)
77 users (show)

Fixed In Version:
Clone Of:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:94749 0 None None None 2026-11-03 20:26:19 UTC

Description OSIDB Bzimport 2026-10-22 16:43:13 UTC 
dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fixed in version 2.9.0.
Comment 2 Jon Orris 2026-11-03 20:26:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:94749 https://access.redhat.com/errata/RHSA-2026:94749
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