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Vulnerability record · CVE-2020-24342 · published 13 August 2020

CVE-2020-24342: Lua memory buffer overflow vulnerability

Lua · Lua

Lua through 5.4.0 allows a stack redzone cross in luaO_pushvfstring because a protection mechanism wrongly calls luaD_callnoyield twice in a row.

7.8 CVSS 3.1 High EPSS 1.1% · top 36.1% CWE-119 · Memory buffer overflow
7.8CVSS 3.1 base score, v2 6.8
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Lua through 5.4.0 allows a stack redzone cross in luaO_pushvfstring because a protection mechanism wrongly calls luaD_callnoyield twice in a row.

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

Affected products

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

References

LinkTags
http://lua-users.org/lists/lua-l/2020-07/msg00052.html ExploitMailing ListVendor Advisory
https://github.com/lua/lua/commit/34affe7a63fc5d842580a9f23616d057e17dfe27 PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QA5Q5MDQMTGXRQO3PAQ4EZF
http://lua-users.org/lists/lua-l/2020-07/msg00052.html ExploitMailing ListVendor Advisory
https://github.com/lua/lua/commit/34affe7a63fc5d842580a9f23616d057e17dfe27 PatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QA5Q5MDQMTGXRQO3PAQ4EZF

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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-2020-24342), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.