CVE-2021-44647

lua: type confusion in funcnamefromcode in ldebug.c could result in local DoS

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · January 11, 2022

Updated · November 2, 2026

Description

A flaw was found in Lua. An SEGV crash in the funcnamefromcode() function in ldebug.c during error handling occurs in '__close' metamethods. This flaw allows an attacker to cause a denial of service.

Statement

This vulnerability affects Lua v5.4.3 and above which we do not ship in any of our products.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-843 · Access of Resource Using Incompatible Type