ipgre: test csumstart instead of transport header
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.47 by commit e6b6f98fc7605c06c0a3baa70f62c534d7b4ce58, it was introduced in version v5.15 by commit 8a0ed250f911da31a2aef52101bc707846a800ff. For more details please see the references link.