A Decade Old Unix/Linux/BSD Root Privilege-Escalation Bug Discovered

Stack Clash is a malicious program can attempt to use more memory space than available on the stack, which could overflow the memory and can also bypass the stack guard-page, a memory management protection introduced in 2010, after this issue was exploited in 2005 and 2010.
Here's the link to Red Hat notice:
https://access.redhat.com/security/cve/CVE-2 [login to see]

and here's more detailed info from Qualys:
https://blog.qualys.com/securitylabs/2017/06/19/the-stack-clash