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2.9 Low

CVE-2026-0992 Libxml2: libxml2: denial of service via crafted xml catalogs

Description

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.

CVSS 3.1 detail

Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitable with local access to the machine, without an account and without any user action; the impact on data or service is limited.

Attack vector
Local
Attack complexity
High
Privileges required
None
Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat JBoss Core Services Versions not published
Red Hat OpenShift Container Platform 4 Versions not published
Red Hat Hardened Images 2.15 earliest → < 2.15.2-0.3.hum1 2.15.2-0.3.hum1
Red Hat OpenShift AI (RHOAI) Versions not published

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