Vulnerability in Ibm Aix
CVE-2026-0990
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.
EPSS: 0.008 (52.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Ibm Aix — versions 7.3.4
- Ibm Vios — versions 4.1.2.0
- Xmlsoft Libxml2
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images — versions 2.15.2-0.3.hum1
- Red Hat Jboss Core Services
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Exploit, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2026-0990?
- CVE-2026-0990 is a medium-severity vulnerability in Ibm Aix, classified under Uncontrolled Recursion. CVSS score: 5.9/10. Published 2026-01-15.
- How severe is CVE-2026-0990?
- Medium severity. CVSS v3 base score is 5.9 out of 10.