CVE-2019-11925: Facebook Hhvm

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

Insufficient boundary checks when processing the JPEG APP12 block marker 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.

Affected products

• Facebook Hhvm: up to and including 3.30.9; from 4.0.0, up to and including 4.8.3; from 4.9.0, up to and including 4.15.2; from 4.16.0, up to and including 4.16.3; from 4.17.0, up to and including 4.17.2; from 4.18.0, up to and including 4.18.1; …

Published 2019-09-06. Last modified 2026-06-17.