build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
https://www.tenable.com/security/tns-2022-05
https://www.debian.org/security/2022/dsa-5073
https://security.gentoo.org/glsa/202209-24
https://github.com/libexpat/libexpat/pull/539
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
http://www.openwall.com/lists/oss-security/2022/01/17/3
Source: Mitre, NVD
Published: 2022-01-10
Updated: 2025-05-05
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.00409
