An unsigned integer underflow vulnerability in IPA driver result into a buffer over-read while reading NAT entry using debugfs command 'cat /sys/kernel/debug/ipa/ip4_nat'
https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-17619
https://docs.qualcomm.com/product/publicresources/securitybulletin/may-2018-bulletin.html