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CVE-2026-0992

Libxml2: libxml2: denial of service via crafted xml catalogs

Published: 1/15/2026 Last updated: 4/22/2026 Reserved: 1/15/2026

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 2.9 Low CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Opam packages affected (5)

bap-llvm conf-gtksourceview conf-gtksourceview3 conf-librsvg2 lablgtk3-gtkspell3

Products affected (14)

Product Vendor Version
Red Hat Enterprise Linux 10 Red Hat n/a
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat JBoss Core Services Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat JBoss Core Services Red Hat n/a
Red Hat Enterprise Linux 10 Red Hat n/a
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Hardened Images Red Hat n/a
Red Hat OpenShift Container Platform 4 Red Hat n/a
Red Hat OpenShift Container Platform 4 Red Hat n/a

References (7)

Credits (2)