Red Hat Hardened Images: Access of Resource Using Incompatible Type
CVE-2026-6732 is a high-severity access of resource using incompatible type vulnerability in Red Hat Hardened Images from Red Hat, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.63% chance of exploitation within 30 days, higher than 51% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Libxml2 to 2.15.3 or a later version.
- Update Vios to 4.1.1.30 or a later version.
- Update Aix to 7.2.5.12 or 7.3.3.3, whichever matches your release line, or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 10 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 6 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 7 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 8 | Not specified in the record | Not stated |
| Red Hat | Red Hat Enterprise Linux 9 | Not specified in the record | Not stated |
| Red Hat | Red Hat JBoss Core Services | Not specified in the record | Not stated |
| Red Hat | Red Hat OpenShift Container Platform 4 | Not specified in the record | Not stated |
| Xmlsoft | Libxml2 | 2.13.0 up to, but not including, 2.15.3 | 2.15.3 |
| Red Hat | Hardened Images | Not specified in the record | Not stated |
| Red Hat | Jboss Core Services | Not specified in the record | Not stated |
| Red Hat | Openshift Container Platform | 4.0 | Not stated |
| Red Hat | Enterprise Linux | 6.0; 7.0; 8.0; 9.0; 10.0 | Not stated |
| IBM | Vios | 4.1.0 up to, but not including, 4.1.1.30; 4.1.2.0 | 4.1.1.30 |
| IBM | Aix | 7.2.5 up to, but not including, 7.2.5.12; 7.3.2 up to, but not including, 7.3.3.3; 7.3.4 | 7.2.5.12, 7.3.3.3 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.5 | Medium | CNA (redhat.com) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Resource Using Incompatible Type
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
More Access of Resource Using Incompatible Type vulnerabilities (CWE-843)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411Issue Tracking, Third Party Advisory
Third-party and government advisories
- access.redhat.com/errata/RHSA-2026:11503Third Party Advisory
- access.redhat.com/security/cve/CVE-2026-6732Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2461300Issue Tracking, Third Party Advisory
Technical write-ups (may include proof of concept)
- gitlab.gnome.org/GNOME/libxml2/-/issues/1097Exploit, Issue Tracking, Third Party Advisory
Other vulnerabilities in Red Hat Hardened Images
- 8.4 High severity
- 7.6 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
Recent Access of Resource Using Incompatible Type vulnerabilities
- 7.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 7.8 High severity
- 7.7 High severity
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