An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be jmp"ed over, this affects Linux Kernel versions 4.11.5 and earlier . An issue was discovered in the size of the default stack guard page on GRSecurity/PAX Linux, specifically the default stack guard page is not sufficiently large and can be jmp"ed over, this affects GRSecurity/PAX Linux Kernel versions as of June 19, 2017 . The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIMIT_INFINITY and 1 Gigabyte of memory is allocated then the stack will be grown down to 0x80000000, and as the PIE binary is mapped above 0x80000000 the minimum distance between the end of the PIE binary"s read-write segment and the start of the stack becomes small enough that the stack guard page can be jumped over by an attacker. This is a different issue than CVE-2017-1000370 and CVE-2017-1000365