Stack overflow in lua_resume of ldo.c in Lua Interpreter 5.1.0~5.4.4 allows attackers to…
Priority LOW 27CWE-674Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 6 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-674.
Summary
Stack overflow in lua_resume of ldo.c in Lua Interpreter 5.1.0~5.4.4 allows attackers to perform a Denial of Service via a crafted script file.
Why it matters now
EPSS 0.01227 69th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 6 fixed, 2 without a fix
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 · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:* | 5.1.0 to before 5.3.5; 5.4.0 to before 5.4.4 | Vulnerable | Lua |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
- cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:* Versions 5.1.0 to before 5.3.5; 5.4.0 to before 5.4.4 Vulnerable ·Lua
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
Remediation
Red Hat 2 advisories
- RHSA-2023:1211 Released 2023-03-14 · Red Hat rating Moderatelua security update
- Red Hat CodeReady Linux Builder EUS (v.9.0) lua-5.4.4-1.el9_0.1, lua-devel-5.4.4-1.el9_0.1
- Red Hat Enterprise Linux AppStream EUS (v.9.0) lua-5.4.4-1.el9_0.1
- Red Hat Enterprise Linux BaseOS EUS (v.9.0) lua-5.4.4-1.el9_0.1, lua-libs-5.4.4-1.el9_0.1
- RHSA-2023:0957 Released 2023-02-28 · Red Hat rating Moderatelua security update
- Red Hat CodeReady Linux Builder (v. 9) lua-5.4.4-2.el9_1, lua-devel-5.4.4-2.el9_1
- Red Hat Enterprise Linux AppStream (v. 9) lua-5.4.4-2.el9_1
- Red Hat Enterprise Linux BaseOS (v. 9) lua-5.4.4-2.el9_1, lua-libs-5.4.4-2.el9_1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2023:0957 |
| Red Hat CodeReady Linux Builder EUS (v.9.0) | Fixed | RHSA-2023:1211 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:0957 |
| Red Hat Enterprise Linux AppStream EUS (v.9.0) | Fixed | RHSA-2023:1211 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2023:0957 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.0) | Fixed | RHSA-2023:1211 |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat JBoss Core Services
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43519
- 2026-10-03 Alias added: GHSA-g78p-3v3v-h7wm
References
Sources
- CVE-2021-43519 · CVE Program
- CVE-2021-43519 · NVD
- FIRST EPSS
- GHSA-g78p-3v3v-h7wm · GitHub Advisory Database · CC BY 4.0
- CVE-2021-43519 · 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