CVE-2020-24369

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped...

7.5 HighFix available

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.68%Up 1.1 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Record: CVE-2020-24369
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-476
Updated: 2026-11-02

CVE List No score

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Record: CVE-2020-24369
Updated: 2026-11-02

EUVDEUVD-2020-17101 No score

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Record: EUVD-2020-17101
Updated: 2026-11-03

GitHub AdvisoriesGHSA-8g95-2365-4r5r No score

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped...

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Record: GHSA-8g95-2365-4r5r
Updated: 2026-11-02

OSV 7.5

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Record: CVE-2020-24369
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-24369 7.5

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Record: DEBIAN-CVE-2020-24369
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVBIT-lua-2020-24369 No score

ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL pointer dereference.

Record: BIT-lua-2020-24369
Updated: 2026-11-02

OSVopenSUSE-SU-2024:11029-1 No score

liblua5_4-5-32bit-5.4.3-4.2 on GA media

These are all security issues fixed in the liblua5_4-5-32bit-5.4.3-4.2 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:11029-1
Updated: 2026-11-02

OSVopenSUSE-SU-2025:15401-1 No score

liblua5_5-5-5.5.0~beta1-1.1 on GA media

These are all security issues fixed in the liblua5_5-5-5.5.0~beta1-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2025:15401-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`lua` Bitnami	5.4.0 up to 5.4.1	5.4.1
`lua5.4` Debian:12	before 5.4.1-1	5.4.1-1
`lua5.4` Debian:13	before 5.4.1-1	5.4.1-1
`lua5.4` Debian:14	before 5.4.1-1	5.4.1-1
`lua55` openSUSE:Tumbleweed From an advisory covering 9 CVEs	before 5.5.0~beta1-1.1	5.5.0~beta1-1.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-24369 is a high vulnerability (CVSS 7.5) in Lua, published August 17, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.68%, the 77th percentile. Fixed in lua 5.4.1.

References

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