CVE-2021-44964

MEDIUM

Published Mar 14, 20224y ago · Modified Jun 17, 20262w ago

6.3 CVSS 3.1

Medium

Published Mar 14, 2022 4y ago

Last Modified Jun 17, 2026 2w ago

Description

Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file.

CVSS Details

Base Score

6.3

Exploitability

1.8

Impact

4.0

Vector string

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

Attack Vector Local

Attack Complexity Low

Privileges Required None

User Interaction Required

Scope Changed

Confidentiality None

Integrity None

Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status

Public Exploit Known

No Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 1

Vendor	Product	Version	Range
lua	lua	*	≥5.4.0 – ≤5.4.3

References 5

lua-users.org http://lua-users.org/lists/lua-l/2021-11/msg00186.html

ExploitMailing ListTechnical DescriptionVendor Advisory
lua-users.org http://lua-users.org/lists/lua-l/2021-12/msg00007.html

ExploitMailing ListVendor Advisory
lua-users.org http://lua-users.org/lists/lua-l/2021-12/msg00015.html

Mailing ListVendor Advisory
lua-users.org http://lua-users.org/lists/lua-l/2021-12/msg00030.html

Mailing ListVendor Advisory
github.com https://github.com/Lua-Project/lua-5.4.4-sandbox-escape-with-new-vulnerability

ExploitThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.