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CVE-2026-6653

Updated on 22 Jun 2026

Severity

9.8 Critical severity

Details

CVSS score
9.8
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

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.

Details

Affected product:
AlmaLinux 9.2 ESU , Alpine Linux 3.23 , Alpine Linux 3.24 , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , Debian 10 , Debian 10 ELS , Debian 11 , Debian 11 ELS , Debian 12 , Debian 13 , EL 10 , EL 6 , EL 7 , EL 8 , EL 9 , TuxCare 9.6 ESU , TuxCare 9.8 ESU , Ubuntu 16.04 , Ubuntu 18.04 , Ubuntu 20.04 , Ubuntu 22.04 , Ubuntu 24.04 , Ubuntu 26.04
Affected packages:
alt-libxml2 @ 2.10.2 (+25 more)

Fixes