CVE catalog
CVE-2020-1900
UBUNTU-CVE-2020-1900
- Severity
- Unknown
- Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 1.38% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | hhvm | 16.04 | 3.11.0+dfsg-1 | vulnerable |
| Ubuntu | hhvm | 16.04 | 3.11.1+dfsg-1 | vulnerable |
| Ubuntu | hhvm | 16.04 | 3.11.1+dfsg-1ubuntu1 | vulnerable |
| Ubuntu | hhvm | 18.04 | 3.21.0+dfsg-2 | vulnerable |
| Ubuntu | hhvm | 18.04 | 3.21.0+dfsg-2build1 | vulnerable |
| Ubuntu | hhvm | 18.04 | 3.21.0+dfsg-2build2 | vulnerable |
| Ubuntu | hhvm | 18.04 | 3.21.0+dfsg-2build3 | vulnerable |
| Ubuntu | hhvm | 18.04 | 3.21.0+dfsg-2ubuntu2 | vulnerable |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed: