Vulnerability in IBM Aix
CVE-2026-6732
A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.009 · change: +0.003
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 2.15.3-0.1.hum1
- Red Hat Jboss Core Services
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:11503 (vendor-advisory, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2026-6732 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- gitlab.gnome.org/GNOME/libxml2/-/issues/1097 (Exploit, Third Party Advisory, Issue Tracking)
- gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411 (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2026-6732?
- CVE-2026-6732 is a medium-severity vulnerability in IBM Aix, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.5/10. Published 2026-04-23.
- How severe is CVE-2026-6732?
- Medium severity. CVSS v3 base score is 6.5 out of 10.