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CVE-2026-6653

libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling

Published: 6/22/2026 Last updated: 6/22/2026 Reserved: 4/20/2026

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.

CNA assigner: canonical (cc1ad9ee-3454-478d-9317-d3e869d708bc) Requested by: n/a

Metrics

Version Score Severity Vector String
4.0 7 High CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Opam packages affected (5)

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

Products affected (1)

Product Vendor Version
libxml2 GNOME n/a

References (2)

Credits (1)