In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
Fix
Public exploits 1
- nanopathi/external_expat_AOSP10_r33_CVE-2021-46143 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 8
- http://www.openwall.com/lists/oss-security/2022/01/17/3 Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/532 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/538 Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/01/17/3 Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/532 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/538 Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.8 · libexpat_project, netapp, tenableNVD modified 2026-10-14 13:17
Affected (CPE criteria) 10
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:*cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:*cpe:2.3:a:netapp:hci_baseboard_management_controller:h615c:*:*:*:*:*:*:*cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*
References 18
- http://www.openwall.com/lists/oss-security/2022/01/17/3 Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/532 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/538 Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202209-24 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0006/ Third Party Advisory
- https://www.debian.org/security/2022/dsa-5073 Third Party Advisory
- https://www.tenable.com/security/tns-2022-05 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/01/17/3 Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/532 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/538 Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202209-24 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0006/ Third Party Advisory
- https://www.debian.org/security/2022/dsa-5073 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