Critical severity9.8NVD Advisory· Published Jan 15, 2019· Updated Jun 17, 2026
CVE-2019-3557
CVE-2019-3557
Description
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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Affected products
3Patches
Vulnerability mechanics
References
2- github.com/facebook/hhvm/commit/6e4dd9ec3f14b48170fc45dc9d13a3261765f994nvdPatchThird Party Advisory
- hhvm.com/blog/2019/01/14/hhvm-3.30.2.htmlnvdVendor Advisory
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