CVE-2017-5923: Virustotal Yara

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (heap-based out-of-bounds read and application crash) via a crafted rule that is mishandled in the yara_yyparse function.

Affected products

• Virustotal Yara: version 3.5.0 only

Published 2017-04-03. Last modified 2026-06-17.