CVE-2021-43519: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 1.2% chance of exploitation in the next 30 days.

Stack overflow in lua_resume of ldo.c in Lua Interpreter 5.1.0~5.4.4 allows attackers to perform a Denial of Service via a crafted script file.

Affected products

• Fedoraproject Fedora: version 35 only
• Lua Lua: from 5.1.0, before 5.3.5 (fixed in 5.3.5); from 5.4.0, before 5.4.4 (fixed in 5.4.4)

Published 2021-11-09. Last modified 2026-06-17.