CVE Database›CVE-2021-43519

CVE-2021-43519

lua: stack overflow in lua_resume of ldo.c allows a DoS via a crafted script file

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · November 9, 2021

Updated · August 4, 2026

Description

A stack overflow issue was discovered in Lua in the lua_resume() function of 'ldo.c'. This flaw allows a local attacker to pass a specially crafted file to the Lua Interpreter, causing a crash that leads to a denial of service.

Statement

This vulnerability does not affect Red Hat Enterprise Linux 8, because code-base was completely rewritten between 5.3 and 5.4. So, RHEL-8 is unlikely to be affected by this or a similar issue.

This flaw is marked as Out-of-Support-Scope for Red Hat Enterprise Linux 6 and 7 because the flaw impact is moderate. For additional information, refer to the Red Hat Enterprise Linux Life Cycle & Update Policy: https://access.redhat.com/support/policy/updates/errata/.

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:N/UI:R/S:U/C:N/I:N/A:H

CWE-787 · Out-of-bounds Write