build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
1.16.33-3.2ubuntu31.33.06-0ubuntu10.6.3-3build10.1.0+git20150808-10.1.0+git20150808-20.23.3-2ubuntu23.20.1+git20120521-63.20.1+git20120521-6build14.8.1-1ubuntu34.8.1-1ubuntu44.8.2-3.1ubuntu14.9.0-3ubuntu24.9.0-4ubuntu14.9.0-4ubuntu1.10.13+ds1-52.4.7-42.4.7-4build10.8.3-10.10.7-1Exploitability
AV:NAC:LPR:NUI:NScope
S:UImpact
C:HI:HA:HCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H