What the vulnerability does

01Description

The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. This affects all supported versions of HHVM (3.30.1 and 3.27.5 and below).

Key dates

02Disclosure timeline

January 15, 2019 CVE published
August 5, 2024 Record updated

Related vulnerabilities

04Related CVE