VULNERABILITY INTELLIGENCE

CVE-2020-1919

CVSS score7.5 HIGH

EPSS probability1.22%

CISA KEVNot currently listed

Published2021-03-10

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

Incorrect bounds calculations in substr_compare could lead to an out-of-bounds read when the second string argument passed in is longer than the first. 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.

Weakness classification

cve-assign@fb.com: CWE-125
nvd@nist.gov: CWE-125

Primary references

cve-assign@fb.com — Patch, Third Party Advisory
cve-assign@fb.com — Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory