When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property array before inserting anything into it. Otherwise the array might resize, invalidating previously stored references. This pre-reservation was not occurring in HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: facebook

Published: 2021-03-11T00:55:20

Updated: 2024-08-04T06:54:00.541Z

Reserved: 2019-12-02T00:00:00

Link: CVE-2020-1900

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-03-11T01:15:14.490

Modified: 2021-03-18T14:10:46.000

Link: CVE-2020-1900

cve-icon Redhat

No data.