Lua 5.4.0 has a getobjname heap-based buffer over-read because youngcollection in lgc.c…
Priority MEDIUM 46CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Lua 5.4.0 has a getobjname heap-based buffer over-read because youngcollection in lgc.c uses markold for an insufficient number of list members.
Why it matters now
EPSS 0.02232 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
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
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15889
- 2026-10-03 Alias added: GHSA-j29r-h8wr-v5v8
References
More Lua vulnerabilities
- TI-2021-20978 In Lua 5.4.3, an erroneous finalizer called during a tail call leads to a heap-based buffer over-read. CVSS 3.1HIGH 7.5
- TI-2019-04752 Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. CVSS 3.1HIGH 7.5
- TI-2022-11427 singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a… CVSS 3.1CRITICAL 9.1
- TI-2020-12506 Lua through 5.4.0 mishandles the interaction between stack resizes and garbage… CVSS 3.1HIGH 8.8
- TI-2022-14562 An issue in the component luaG_runerror of Lua v5.4.4 and below leads to a heap-buffer… CVSS 3.1HIGH 7.5
- TI-2014-04459 Buffer overflow in the vararg functions in ldo.c in Lua 5.1 through 5.2.x before 5.2.3… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2020-15889 · CVE Program
- CVE-2020-15889 · NVD
- FIRST EPSS
- GHSA-j29r-h8wr-v5v8 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-15889 · Red Hat security data · CC BY 4.0
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