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High severity7.5NVD Advisory· Published Mar 10, 2021· Updated Jun 17, 2026

CVE-2020-1918

CVE-2020-1918

Description

In-memory file operations (ie: using fopen on a data URI) did not properly restrict negative seeking, allowing for the reading of memory prior to the in-memory buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

8
  • Facebook/Hhvm7 versions
    cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*+ 6 more
    • cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*range: <4.56.3
    • cpe:2.3:a:facebook:hhvm:4.94.0:*:*:*:*:*:*:*
    • cpe:2.3:a:facebook:hhvm:4.95.0:*:*:*:*:*:*:*
    • cpe:2.3:a:facebook:hhvm:4.96.0:*:*:*:*:*:*:*
    • cpe:2.3:a:facebook:hhvm:4.97.0:*:*:*:*:*:*:*
    • cpe:2.3:a:facebook:hhvm:4.98.0:*:*:*:*:*:*:*
    • (no CPE)range: 4.98.0
  • HHVM/HHVMllm-fuzzy
    Range: <4.56.3, 4.57.0-4.80.1, 4.81.0-4.93.1, 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0

Patches

Vulnerability mechanics

References

2

News mentions

0

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