CVE-2022-23852 Integer overflow in n/a

Critical 9.8 Published 24 Jan 2022 Updated 14 Oct 2026

A signed integer overflow in libexpat's XML_GetBuffer can cause denial of service when XML_CONTEXT_BYTES is nonzero.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2022-23852?

CVE-2022-23852 is a critical vulnerability in Debian Debian Linux, published on 24 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.

Weakness: CWE-190

Which versions are affected by CVE-2022-23852?

It affects 7 products.

Linux distribution packages (4)

`expat` Red Hat:rhel_eus:8.4::baseos	All versions	`0:2.2.5-4.el8_4.3`
`expat-debuginfo` Red Hat:rhel_eus:8.4::baseos	All versions	`0:2.2.5-4.el8_4.3`
`expat-debugsource` Red Hat:rhel_eus:8.4::baseos	All versions	`0:2.2.5-4.el8_4.3`
`expat-devel` Red Hat:rhel_eus:8.4::baseos	All versions	`0:2.2.5-4.el8_4.3`

Products include Debian Debian Linux, Libexpat Project Libexpat, Netapp Clustered Data Ontap, Netapp Oncommand Workflow Automation, Oracle Communications Metasolv Solution, Siemens Sinema Remote Connect Server and 1 more.

How do I fix CVE-2022-23852?

Upgrade to a fixed version.

Is CVE-2022-23852 being exploited?

There is no known exploitation of CVE-2022-23852 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Debian Debian Linux vulnerabilities

Sources

Also known as A-221255869, ALPINE-CVE-2022-23852, ASB-A-221255869, AZL-7835, CLEANSTART-2026-SH01727, DEBIAN-CVE-2022-23852 and 4 more.