| Package | Affected versions | Patched versions |
|---|---|---|
| hhvm | ≥ 3.28.0, ≤ 3.30.0≤ 3.27.4 |
The implementations of streams for bz2 and php://output improperly implemented their readImpl functions, returning -1 consistently. This behavior caused some stream functions, such as stream_get_line, to trigger an out-of-bounds read when operating on such malformed streams. The implementations were updated to return valid values consistently. This affects all supported versions of HHVM (3.30 and 3.27.4 and below).
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