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CVE-2022-23852 libexpat

Affected softwarelibexpat
Severity9.8 Critical CVSS 3.1 3 scores
WeaknessInteger overflow (CWE-190)
Published24 Jan 2022
Updated14 Oct 2026

Description

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

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 4 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 5.1% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

9.8 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published
CVSS 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CISA-ADP Secondary
CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Affected software and releases

Products and versions

7 products, 8 version entries
SourceVendorProductSchemeAffected versions
nvd debian debian linux generic 9.0
nvd libexpat project libexpat generic < 2.4.4
nvd netapp clustered data ontap generic any version
nvd netapp oncommand workflow automation generic any version
nvd oracle communications metasolv solution generic 6.3.1
nvd siemens sinema remote connect server generic < 3.1
nvd tenable nessus generic < 8.15.3 · ≥ 10.0.0 and < 10.1.1

References

URLTags
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Third Party Advisory
https://github.com/libexpat/libexpat/pull/550 Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00007.html Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202209-24 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220217-0001/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5073 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Third Party Advisory
https://www.tenable.com/security/tns-2022-05 Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-484086.html

Timeline

Published2022-01-24By the CVE Program.
NVD record modified2026-10-14NVD's own last-modified date for this record.