CVE-2026-0990
Published: January 16, 2026Last modified: January 20, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libxml2 | Fixed (2.10.4-r7) |
| 25 LTS | libxml2 | Fixed (2.13.9-r1) | |
| Stream | libxml2 | Fixed (2.13.9-r1) | |
| Hardened Containers | 23 LTS | libxml2 | Fixed (2.10.4-r7) |
| 25 LTS | libxml2 | Fixed (2.13.9-r1) | |
| Stream | libxml2 | Fixed (2.13.9-r1) |