add references

Author: Aaron Lewis

2018/CVE-2018-18955/readme.md

@@ -4,5 +4,6 @@ In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write() in kernel/u
 
 ### References
 
+* [https://github.com/bcoles/kernel-exploits](https://github.com/bcoles/kernel-exploits)
 * [https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-18955.html](https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-18955.html)
 * [https://access.redhat.com/security/cve/cve-2018-18955](https://access.redhat.com/security/cve/cve-2018-18955)