PT-2026-51315 · Libxml2+3 · Libxml2+3

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CVE-2026-6653

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Published

2026-06-22

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Updated

2026-08-31

CVSS v3.1

9.8

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions libxml2 versions 2.9.11 through 2.11.0
Description A Use After Free issue exists in the xmlParseInternalSubset() function of libxml2. This occurs due to improper entity resolution handling, which allows a remote attacker to cause a denial-of-service by providing maliciously crafted XML input. Use After Free is a memory corruption flaw where a program continues to use a pointer after it has been freed.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

XXE

Use After Free

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Weakness Enumeration

Related Identifiers

ALSA-2026:61247
CVE-2026-6653
ECHO-145E-CEA4-F440
USN-8456-1

Affected Products

Linuxmint
Rocky Linux
Ubuntu
Libxml2