CVE-2022-28805

Critical

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.

SeverityCritical

CVSS9.1

Exploit probability87. percentile3%

Product

Lua

PublishedApr 8, 2022

First seenApr 8, 2022

How to fix

Update

lua lua5.4.5 or later

Vendor advisories

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGIA3HWWC36R/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6DNONIVVHPA/
security.gentoo.org/glsa/202305-23

Affected products

Product	Affected versions	Fixed in
lua lua	5.4.0 ≤ v < 5.4.5	5.4.5
fedoraproject fedora	35, 36	—

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