CVE-2026-0990

MEDIUM

Red Hat Enterprise Linux 6-10 - Denial of Service via XML Catalog Delegate URI Recursion

Title source: llm
STIX 2.1

Description

A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker could exploit this configuration-dependent issue by providing a specially crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.

References (4)

Core 4
Core References
Vendor Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-0990
Issue Tracking issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2429959
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:7519
https://access.redhat.com/errata/RHSA-2026:7519

Scores

CVSS v3 5.9
EPSS 0.0073
EPSS Percentile 49.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-674
Status published
Products (9)
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
Red Hat/Red Hat Hardened Images
Red Hat/Red Hat Hardened Images 2.15.2-0.3.hum1
Red Hat/Red Hat JBoss Core Services
Red Hat/Red Hat OpenShift Container Platform 4
Published Jan 15, 2026
Tracked Since Feb 18, 2026