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Critical severity9.8NVD Advisory· Published Mar 10, 2021· Updated Jun 17, 2026

CVE-2021-24025

CVE-2021-24025

Description

Due to incorrect string size calculations inside the preg_quote function, a large input string passed to the function can trigger an integer overflow leading to a heap overflow. 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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