CVE-2021-46143
HIGH 7.8EPSS 4.2%
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
- CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v3.1 MITRE
- 8.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P - EPSS
- 4.22% chance of exploitation in the next 30 days, 91st percentile
- Published
- 2022-01-06
- Updated
- 2026-10-14
Proof-of-concept exploits (2)
- Trinadh465/external_lib_AOSP10_r33_CVE-2021-45960_CVE-2021-46143-0★ · 2022-05-25
- nanopathi/external_expat_AOSP10_r33_CVE-2021-461430★ · 2022-04-11
Security advisories
- http://www.openwall.com/lists/oss-security/2022/01/17/3
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
- libexpat/libexpat/issues/532
- https://security.gentoo.org/glsa/202209-24
- https://security.netapp.com/advisory/ntap-20220121-0006
- https://www.debian.org/security/2022/dsa-5073
- https://www.tenable.com/security/tns-2022-05