Provide references for CVE-2019-3557.
Where can I find more information about CVE-2019-3557?
References are available at: https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html, https://github.com/facebook/hhvm/commit/6e4dd9ec3f14b48170fc45dc9d13a3261765f994.