Home/CVE/In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
CVE

CVE-2021-46143

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

HIGH · CVSS 8.1 EPSS 0.04193
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-190Integer Overflow or Wraparound
CWE-190Integer Overflow or Wraparound
▤

Affected Products & Versions

9
libexpat project libexpat< 2.4.3
netapp active iq unified managerall versions
netapp clustered data ontapall versions
netapp hci baseboard management controllerall versions
netapp oncommand workflow automationall versions
netapp solidfire \& hci management nodeall versions
tenable nessus< 8.15.3
tenable nessus>= 10.0.0 and < 10.1.1
⚠

Public Exploits & PoCs

1
pocgithub.com · issues/532github.com
▣

Scoring & Timeline

8.1
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Jan 2022 · 04:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

22
usnUSN-7913-1
rhsaRHSA-2025:22785Important
rhsaRHSA-2025:22871Important
usnUSN-7199-1
suse-csafopenSUSE-SU-2024:11762-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2022/01/17/3Mailing ListPatchThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfPatchThird Party Advisory
https://github.com/libexpat/libexpat/pull/538PatchThird Party Advisory
https://security.gentoo.org/glsa/202209-24Third Party Advisory
https://security.netapp.com/advisory/ntap-20220121-0006/Third Party Advisory
https://www.debian.org/security/2022/dsa-5073Third Party Advisory
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