CVEvulnerability

CVE-2020-15945

5.5 MEDIUM Published 2020-07-24 Modified 2026-06-17 Official page ↗

Status: Modified
Published: 2020-07-24
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected]): 2.1 LOW — AV:L/AC:L/Au:N/C:N/I:N/A:P

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.

Affected configurations

• lua lua (>= 5.3.1 < 5.4.0)

References

http://lua-users.org/lists/lua-l/2020-07/msg00123.html Exploit, Mailing List, Third Party Advisory
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3 Patch, Third Party Advisory
https://www.lua.org/bugs.html#5.4.0-8 www.lua.org
http://lua-users.org/lists/lua-l/2020-07/msg00123.html Exploit, Mailing List, Third Party Advisory
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3 Patch, Third Party Advisory