What’s Vulnerable › Vulnerabilities

CVE-2020-24342

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-08-13 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Fedoraproject Fedora: 33
• Lua: 5.4.0

References

• http://lua-users.org/lists/lua-l/2020-07/msg00052.html
• https://github.com/lua/lua/commit/34affe7a63fc5d842580a9f23616d057e17dfe27
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QA5Q5MDQMTGXRQO3PAQ4EZFTYWJXZM5N/
• http://lua-users.org/lists/lua-l/2020-07/msg00052.html
• https://github.com/lua/lua/commit/34affe7a63fc5d842580a9f23616d057e17dfe27
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QA5Q5MDQMTGXRQO3PAQ4EZFTYWJXZM5N/

Get alerted when CVE-2020-24342 or the next vulnerability affects your stack