CVE-2018-19975: Virustotal Yara

Medium severity, CVSS 5.5. EPSS: 1.4% chance of exploitation in the next 30 days.

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memory, in libyara/exec.c. Specifically, OP_COUNT can read a DWORD.

Affected products

• Virustotal Yara: version 3.8.1 only

Published 2018-12-17. Last modified 2026-06-17.