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CVE-2025-6021

Libxml2: integer overflow in xmlbuildqname() leads to stack buffer overflow in libxml2

Published: 6/12/2025 Last updated: 10/12/2026 Reserved: 6/12/2025

A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.

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

Metrics

Version Score Severity Vector String
3.1 7.5 High CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Opam packages affected (5)

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

Products affected (0)

No product listed.

References (29)

Credits (1)