Expat (aka libexpat) before 2
Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.
Exploitability
AV:N
AC:L
PR:N
UI:N
Scope
S:U
Impact
C:H
I:H
A:H
9.8/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H