CVE-2026-0992: IBM Aix

Low severity, CVSS 2.9. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.

Affected products

• IBM Aix: from 7.2.5, before 7.2.5.12 (fixed in 7.2.5.12); from 7.3.2, before 7.3.3.3 (fixed in 7.3.3.3); version 7.3.4 only
• IBM Vios: from 4.1.0, before 4.1.1.30 (fixed in 4.1.1.30); version 4.1.2.0 only
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only; version 9.0 only; version 10.0 only
• Red Hat Hardened Images: affected versions not specified
• Red Hat JBoss Core Services: affected versions not specified
• Red Hat Openshift Container Platform: version 4.0 only
• Xmlsoft LIBXML2: before 2.15.2 (fixed in 2.15.2)

Published 2026-01-15. Last modified 2026-09-01.