Description
singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a certain luaK_exp2anyregup call, leading to a heap-based buffer over-read that might affect a system that compiles untrusted Lua code.
References (7)
Core 7
Core References
Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGIA3HWWC36R/
Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6DNONIVVHPA/
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/202305-23
Patch, Third Party Advisory
https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa
Exploit, Mailing List, Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00001.html
Exploit, Mailing List, Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00070.html
Exploit, Mailing List, Third Party Advisory
https://lua-users.org/lists/lua-l/2022-04/msg00009.html
Scores
CVSS v3
9.1
EPSS
0.0017
EPSS Percentile
38.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (3)
fedoraproject/fedora
35
fedoraproject/fedora
36
lua/lua
5.4.0 - 5.4.5
Published
Apr 08, 2022
Tracked Since
Feb 18, 2026