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CVE-2026-0989

Libxml2: unbounded relaxng include recursion leading to stack overflow

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

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.

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

Metrics

Version Score Severity Vector String
3.1 3.7 Low CVSS:3.1/AV:N/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 (15)

Product Vendor Version
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 10 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat MDM9615, MDM9625, MDM9635M, SD 400, SD 600, SD 800
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Hardened Images Red Hat n/a
Red Hat JBoss Core Services Red Hat n/a
Red Hat Enterprise Linux 6 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 8 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)