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CVE-2022-23852

CRITICAL · CVSS 9.8EPSS 4.6%EU EUVD

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

Key facts

CVSS score
9.8 (v3.1)
Severity
CRITICAL
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-190
EPSS score
4.6% (91th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2022-28778)
Published
January 24, 2022
NVD last modified
October 14, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-28778 in the EU Vulnerability Database. Last updated in EUVD on October 14, 2026.

View on the EU Vulnerability Database

Affected products

  • debian / debian linux
  • libexpat project / libexpat
  • netapp / clustered data ontap
  • netapp / oncommand workflow automation
  • oracle / communications metasolv solution
  • siemens / sinema remote connect server
  • tenable / nessus

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

References

Last updated October 15, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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CVE-2022-23852: CRITICAL severity (CVSS 9.8)