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Vulnerability record · CVE-2022-28805 · published 8 April 2022

CVE-2022-28805: Lua out-of-bounds read vulnerability

Lua · Lua

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.

9.1 CVSS 3.1 Critical EPSS 3.0% · top 13.1% CWE-125 · Out-of-bounds read
9.1CVSS 3.1 base score, v2 6.4
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References, 6 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGI Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6D Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00001.html ExploitMailing ListThird Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00070.html ExploitMailing ListThird Party Advisory
https://lua-users.org/lists/lua-l/2022-04/msg00009.html ExploitMailing ListThird Party Advisory
https://security.gentoo.org/glsa/202305-23 Third Party Advisory
https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGI Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6D Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00001.html ExploitMailing ListThird Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00070.html ExploitMailing ListThird Party Advisory
https://lua-users.org/lists/lua-l/2022-04/msg00009.html ExploitMailing ListThird Party Advisory
https://security.gentoo.org/glsa/202305-23 Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-28805), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.