Security readout for executives and security teams
Plain-English summary
Lua 5.4.0 has a garbage-collection bug that can cause a memory access violation when collectgarbage is involved. Business impact depends on where Lua 5.4.0 is embedded and whether users or integrations can run Lua code. The sources do not provide CVSS, confirmed exploitation, or affected downstream products.
Executive priority
Handle as a targeted dependency review, not an emergency, unless Lua 5.4.0 processes untrusted scripts in critical systems. Lack of severity scoring and exploitation evidence lowers certainty, but memory access violations in embedded runtimes deserve timely validation.
Technical view
The issue is in lgc.c in Lua 5.4.0. The CVE describes mishandling between garbage-collector barriers and the sweep phase, resulting in a memory access violation involving collectgarbage. Upstream Lua bug tracking and a Lua commit are cited, but the provided bundle does not include exploitability detail or downstream vendor impact.
Likely exposure
Exposure is most likely in software embedding or distributing Lua 5.4.0, especially if Lua scripts are user-supplied or processed from untrusted sources. The provided CVE data lists no CPEs or downstream products, so asset owners must inventory Lua usage directly.
Exploitation context
The bundle does not show CISA KEV listing, public exploitation, or weaponized exploit evidence. Treat this as a memory-safety reliability and potential security issue until the Lua runtime version and script trust boundary are confirmed.
Researcher notes
Focus on version confirmation and trust boundaries. The strongest source facts are Lua 5.4.0, lgc.c, garbage-collector barrier and sweep interaction, collectgarbage involvement, and the upstream commit reference. No CVSS, CWE, CPE, or exploitation evidence is provided.
Mitigation direction
- Identify applications and services embedding Lua 5.4.0.
- Review Lua upstream bug 5.4.0-10 and the referenced commit.
- Apply the upstream fix or upgrade when vendor guidance confirms the fixed version.
- Prioritize systems that execute untrusted or externally influenced Lua scripts.
- Monitor downstream product advisories for embedded Lua runtime updates.
Validation and detection
- Inventory Lua runtime versions in packaged applications and build dependencies.
- Confirm whether production systems run Lua 5.4.0 specifically.
- Review whether collectgarbage can be reached through untrusted scripts.
- Check vendor release notes against the referenced Lua fix commit.
- Verify patched builds no longer include the vulnerable Lua 5.4.0 code path.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-24371 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/lua/lua/commit/a6da1472c0c5e05ff249325f979531ad51533110CVE reference · x_refsource_MISC
- https://www.lua.org/bugs.html#5.4.0-10CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.