CVE-2022-23852

Name: CVE-2022-23852
Creator: NVD / NIST
Published: 2022-01-24T02:15:06.733+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.65%

Last modified Jun 17, 2026

CVE-2022-23852 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.. EPSS estimates a 4.65% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.65%

90.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libexpat Project	Libexpat	< 2.4.4
Netapp	Clustered Data Ontap	All versions
Netapp	Oncommand Workflow Automation	All versions
Tenable	Nessus	< 8.15.3
Tenable	Nessus	>= 10.0.0, < 10.1.1
Oracle	Communications Metasolv Solution	6.3.1
Debian	Debian Linux	9.0
Siemens	Sinema Remote Connect Server	< 3.1

References

https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfThird Party Advisory
https://github.com/libexpat/libexpat/pull/550Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00007.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202209-24Third Party Advisory
https://security.netapp.com/advisory/ntap-20220217-0001/Third Party Advisory
https://www.debian.org/security/2022/dsa-5073Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlThird Party Advisory
https://www.tenable.com/security/tns-2022-05Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfThird Party Advisory
https://github.com/libexpat/libexpat/pull/550Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00007.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202209-24Third Party Advisory
https://security.netapp.com/advisory/ntap-20220217-0001/Third Party Advisory
https://www.debian.org/security/2022/dsa-5073Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlThird Party Advisory
https://www.tenable.com/security/tns-2022-05Third Party Advisory

Timeline

Published: Jan 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-23852?

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

How severe is CVE-2022-23852?

CVE-2022-23852 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.65% probability of exploitation in the next 30 days.

How do I fix CVE-2022-23852?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-23852?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST