What is CVE-2020-24369?

CVE-2020-24369 is a high-severity vulnerability in Lua, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-08-17.

How severe is CVE-2020-24369?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Lua

CVE-2020-24369

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.

Published 2020-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: -0.000

Affected products

Lua — versions 5.4.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.lua.org/bugs.html (Exploit, Vendor Advisory)
github.com/lua/lua/commit/ae5b5ba529753c7a653901ffc29b5ea24c3fdf3a (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-24369?: CVE-2020-24369 is a high-severity vulnerability in Lua, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-08-17.
How severe is CVE-2020-24369?: High severity. CVSS v3 base score is 7.5 out of 10.