Qemu has integer overflows because IOReadHandler and its associated functions use a signed integer data type for a size value.

References

• advisory http://www.openwall.com/lists/oss-security/2018/10/17/3
• advisory http://www.securityfocus.com/bid/105953
• patch https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02396.html
• patch https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02402.html