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).

Related CVEs

CVE-2019-3557

Key Information

GHSA ID

GHSA-x6p7-p3gg-q926

Published

May 13, 2022 1:31 AM

Last Modified

May 13, 2022 1:31 AM

CVSS Score

9.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: July 4, 2025 6:21 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.