#VU68829 Resource management error in Libxml2

Published: 2022-10-30 | Updated: 2023-02-08

Vulnerability identifier: #VU68829

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-40304


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Universal components / Libraries / Libraries used by multiple products

Vendor: Gnome Development Team


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists in entities.c due to the way libxml2 handles reference cycles. The library does not anticipate that entity content can be allocated from a dict and clears it upon reference cycle detection by setting its first byte to zero. This can lead to memory corruption  issues, such as double free errors and result in a denial of service.

Install updates from vendor's website.

Vulnerable software versions

Libxml2: 2.0.0 - 2.10.2

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability