CVE-2020-24342

lua: buffer overflow in luaO_pushvfstring

Loading…

Severity

Moderate

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · July 6, 2020

Updated · November 22, 2025

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.

Statement

The versions of lua shipped in Red Hat Enterprise Linux 6, 7 and 8 are not affected by this issue : versions of lua prior to 5.4.0 had a different C-stack overflow control, which did not trigger this flaw.

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 · 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')