CVE-2020-15945: Lua

Medium severity, CVSS 5.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Lua 5.4.0 (fixed in 5.4.1) has a segmentation fault in changedline in ldebug.c (e.g., when called by luaG_traceexec) because it incorrectly expects that an oldpc value is always updated upon a return of the flow of control to a function.

Affected products

• Lua Lua: from 5.3.1, before 5.4.0 (fixed in 5.4.0)

Published 2020-07-24. Last modified 2026-06-17.