ldebug.c in Lua 5.4.0 allows a negation overflow and segmentation fault in getlocal and…
Priority LOW 31CWE-191Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
ldebug.c in Lua 5.4.0 allows a negation overflow and segmentation fault in getlocal and setlocal, as demonstrated by getlocal(3,2^31).
Why it matters now
EPSS 0.03833 90th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lua:lua:5.2.0:-:*:*:*:*:*:* | 5.2.0 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.2.0:alpha:*:*:*:*:*:* | 5.2.0 alpha | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.2.0:beta:*:*:*:*:*:* | 5.2.0 beta | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.2.1:*:*:*:*:*:*:* | 5.2.1 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.2.2:*:*:*:*:*:*:* | 5.2.2 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.2.3:*:*:*:*:*:*:* | 5.2.3 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.3.0:-:*:*:*:*:*:* | 5.3.0 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.3.0:alpha:*:*:*:*:*:* | 5.3.0 alpha | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.3.0:beta:*:*:*:*:*:* | 5.3.0 beta | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.3.1:*:*:*:*:*:*:* | 5.3.1 | Vulnerable | Lua |
- cpe:2.3:a:lua:lua:5.2.0:-:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.2.0:alpha:*:*:*:*:*:* Versions 5.2.0 alpha Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.2.0:beta:*:*:*:*:*:* Versions 5.2.0 beta Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.2.1:*:*:*:*:*:*:* Versions 5.2.1 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.2.2:*:*:*:*:*:*:* Versions 5.2.2 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.2.3:*:*:*:*:*:*:* Versions 5.2.3 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.3.0:-:*:*:*:*:*:* Versions 5.3.0 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.3.0:alpha:*:*:*:*:*:* Versions 5.3.0 alpha Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.3.0:beta:*:*:*:*:*:* Versions 5.3.0 beta Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.3.1:*:*:*:*:*:*:* Versions 5.3.1 Vulnerable ·Lua
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lua:lua:5.3.2:*:*:*:*:*:*:* | 5.3.2 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.3.3:*:*:*:*:*:*:* | 5.3.3 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.3.4:*:*:*:*:*:*:* | 5.3.4 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.3.5:*:*:*:*:*:*:* | 5.3.5 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.4.0:-:*:*:*:*:*:* | 5.4.0 | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.4.0:alpha:*:*:*:*:*:* | 5.4.0 alpha | Vulnerable | Lua |
| cpe:2.3:a:lua:lua:5.4.0:beta:*:*:*:*:*:* | 5.4.0 beta | Vulnerable | Lua |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:lua:lua:5.3.2:*:*:*:*:*:*:* Versions 5.3.2 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.3.3:*:*:*:*:*:*:* Versions 5.3.3 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.3.4:*:*:*:*:*:*:* Versions 5.3.4 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.3.5:*:*:*:*:*:*:* Versions 5.3.5 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.4.0:-:*:*:*:*:*:* Versions 5.4.0 Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.4.0:alpha:*:*:*:*:*:* Versions 5.4.0 alpha Vulnerable ·Lua
- cpe:2.3:a:lua:lua:5.4.0:beta:*:*:*:*:*:* Versions 5.4.0 beta Vulnerable ·Lua
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
Red Hat 1 advisory
- RHSA-2021:4510 Released 2021-11-09 · Red Hat rating Lowlua security update
- Red Hat CodeReady Linux Builder (v. 8) lua-5.3.4-12.el8, lua-devel-5.3.4-12.el8
- Red Hat Enterprise Linux AppStream (v. 8) lua-5.3.4-12.el8
- Red Hat Enterprise Linux BaseOS (v. 8) lua-5.3.4-12.el8, lua-libs-5.3.4-12.el8
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2021:4510 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:4510 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:4510 |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2020-24370
- 2026-10-03 Alias added: GHSA-gfr4-c37g-mm3v
- 2026-10-21 EPSS moved to the 90th–95th percentile
References
Sources
- CVE-2020-24370 · CVE Program
- CVE-2020-24370 · NVD
- FIRST EPSS
- GHSA-gfr4-c37g-mm3v · GitHub Advisory Database · CC BY 4.0
- CVE-2020-24370 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences