singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a…
Priority MEDIUM 45CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a certain luaK_exp2anyregup call, leading to a heap-based buffer over-read that might affect a system that compiles untrusted Lua code.
Why it matters now
EPSS 0.02976 87th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged 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 · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:* | 5.4.0 to before 5.4.5 | Vulnerable | Lua |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 36 | Vulnerable | Fedoraproject |
- cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:* Versions 5.4.0 to before 5.4.5 Vulnerable ·Lua
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
Remediation
Red Hat 1 advisory
- RHSA-2023:2582 Released 2023-05-09 · Red Hat rating Lowlua security update
- Red Hat Enterprise Linux AppStream (v. 9) lua-5.4.4-3.el9
- Red Hat Enterprise Linux BaseOS (v. 9) lua-5.4.4-3.el9, lua-libs-5.4.4-3.el9
- Red Hat Enterprise Linux CRB (v. 9) lua-5.4.4-3.el9, lua-devel-5.4.4-3.el9
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:2582 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2023:2582 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2023:2582 |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat JBoss Core Services
Timeline
- 2026-10-02 Threatist record created from CVE-2022-28805
- 2026-10-03 Alias added: GHSA-pxhp-rhgc-5jx8
References
Exploit 3
Sources
- CVE-2022-28805 · CVE Program
- CVE-2022-28805 · NVD
- FIRST EPSS
- GHSA-pxhp-rhgc-5jx8 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-28805 · 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