CVE-2026-86143

libxml2: Mehrere Schwachstellen

Amazon Linux 2, Red Hat Enterprise Linux, IBM QRadar SIEM, IBM MQ, IBM AIX, RESF Rocky Linux, Ubuntu Linux, Oracle…

In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.

5. Sep 2026

Ausgewertete Quellen

• Hersteller
  https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1111
• CERT-Bund
  WID-SEC-2026-3195
• NVD
  CVE-2026-86143