In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.
Exploitability
AV:LAC:HPR:NUI:NScope
S:UImpact
C:HI:HA:L6.9/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:LOther