CVE-2020-15945

5.5 mediumEPSS 0.5%

Medium (5.5) in lua lua. 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.

Severity

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
Published: 2020-07-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

lua:lua

References

http://lua-users.org/lists/lua-l/2020-07/msg00123.html
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3
https://www.lua.org/bugs.html#5.4.0-8
http://lua-users.org/lists/lua-l/2020-07/msg00123.html
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3

Check your stack JSON