CVE-2020-15945
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.
Does this matter?
Lower severity and a low EPSS score (0.55%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.55% probability · 45th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- lua/lua
- Source
- cve@mitre.org
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lua-users.org/lists/lua-l/2020-07/msg00123.htmlExploit, Mailing List, Third Party Advisory
- https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3Patch, Third Party Advisory
- https://www.lua.org/bugs.html#5.4.0-8
- http://lua-users.org/lists/lua-l/2020-07/msg00123.htmlExploit, Mailing List, Third Party Advisory
- https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.