CVE-2022-28805

Name: CVE-2022-28805
Creator: NVD / NIST
Published: 2022-04-08T06:15:07.243+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 2.92%

Last modified Jun 17, 2026

CVE-2022-28805 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 2.92% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

2.92%

85.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Lua	Lua	>= 5.4.0, < 5.4.5
Fedoraproject	Fedora	35
Fedoraproject	Fedora	36

References

https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030faPatch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGIA3HWWC36R/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6DNONIVVHPA/Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00001.htmlExploit, Mailing List, Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00070.htmlExploit, Mailing List, Third Party Advisory
https://lua-users.org/lists/lua-l/2022-04/msg00009.htmlExploit, Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202305-23Third Party Advisory
https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030faPatch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGIA3HWWC36R/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6DNONIVVHPA/Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00001.htmlExploit, Mailing List, Third Party Advisory
https://lua-users.org/lists/lua-l/2022-02/msg00070.htmlExploit, Mailing List, Third Party Advisory
https://lua-users.org/lists/lua-l/2022-04/msg00009.htmlExploit, Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202305-23Third Party Advisory

Timeline

Published: Apr 8, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-28805?

How severe is CVE-2022-28805?

CVE-2022-28805 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 2.92% probability of exploitation in the next 30 days.

How do I fix CVE-2022-28805?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-28805?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST