CVE-2020-15889: Lua

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

Lua 5.4.0 has a getobjname heap-based buffer over-read because youngcollection in lgc.c uses markold for an insufficient number of list members.

Affected products

• Lua Lua: version 5.4.0 only

Published 2020-07-21. Last modified 2026-06-17.