CVE-2019-11926

Insufficient boundary checks when processing M_SOFx markers from JPEG headers in the GD extension could allow access to out-of-bounds memory via a maliciously constructed invalid JPEG input. This issue affects HHVM versions prior to 3.30.9, all versions between 4.0.0 and 4.8.3, all versions between 4.9.0 and 4.15.2, and versions 4.16.0 to 4.16.3, 4.17.0 to 4.17.2, 4.18.0 to 4.18.1, 4.19.0, 4.20.0 to 4.20.1.

• https://github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15
  PatchThird Party Advisory
• https://hhvm.com/blog/2019/09/03/security-update.html
  Third Party Advisory
• https://www.facebook.com/security/advisories/cve-2019-11926
  Vendor Advisory
• https://github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15
  PatchThird Party Advisory
• https://hhvm.com/blog/2019/09/03/security-update.html
  Third Party Advisory
• https://www.facebook.com/security/advisories/cve-2019-11926
  Vendor Advisory