| Package | Affected versions | Patched versions |
|---|---|---|
| hhvm | ≥ 3.28.0, ≤ 3.30.1≤ 3.27.5 |
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).
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