CVE-2020-1919

Published: Mar 10, 2021Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

Incorrect bounds calculations in substr_compare could lead to an out-of-bounds read when the second string argument passed in is longer than the first. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.

Affected (8)

Products: Facebook: Hhvm

Facebook

1 product

Hhvm

Configuration A

8 vulnerable

Vulnerable Software	Affected Versions
Facebook Hhvm	Before 4.56.3
Facebook Hhvm	From 4.57.0 to 4.80.2
Facebook Hhvm	From 4.81.0 to 4.93.2
Facebook Hhvm	Version 4.94.0
Facebook Hhvm	Version 4.95.0
Facebook Hhvm	Version 4.96.0
Facebook Hhvm	Version 4.97.0
Facebook Hhvm	Version 4.98.0