Redhat Hardened Images
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.
What this means for your business
- It affects Redhat Hardened Images. It matters if your company, or a supplier that handles your data, runs it.
- Code showing how to exploit it has been published, but real attacks have not been confirmed.
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
What to do
- 1Check whether your company or your suppliers run Redhat Hardened Images, and which version. The affected versions are listed further down this page.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 5.9 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness
- CWE-674
- Assigned by
- secalert@redhat.com
Dates
- Published
- 2026-01-15
- Last modified
- 2026-09-01
- Sources
- NVD
Affected products
- Redhat Hardened Imagesall versions
- Redhat Jboss Core Servicesall versions
- Redhat Openshift Container Platform4.0
- Redhat Enterprise Linux6.0, 7.0, 8.0, 9.0, 10.0
- Ibm Vios4.1.0 - 4.1.1.30, 4.1.2.0
- Ibm Aix7.2.5 - 7.2.5.12, 7.3.2 - 7.3.3.3, 7.3.4
- Xmlsoft Libxml2- 2.15.2
As listed in the NVD configuration data. Not a statement about your estate.