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PatchSiren cyber security CVE debrief

CVE-2025-56365 Project CHIP CVE debrief

A reachable assertion vulnerability exists in the Matter SDK (connectedhomeip) before 1.4.0, in the interaction model command processing logic. When an InvokeCommandRequest is sent to a nonexistent endpoint and cluster (e.g., 0x34), the code incorrectly treats the endpoint as valid due to missing checks in CodegenDataModelProvider::Invoke. This causes a VerifyOrDie failure in ProcessCommandDataIB and results in a crash (SIGABRT). The issue has been acknowledged and fixed in a later revision (PR #37207). Users of the Matter SDK (connectedhomeip) before version 1.4.0 should be aware of this vulnerability and take steps to mitigate it.

Vendor
Project CHIP
Product
connectedhomeip (Matter SDK)
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-17
Advisory published
2026-07-14
Advisory updated
2026-07-17

Who should care

Users of the Matter SDK (connectedhomeip) before version 1.4.0, operators of affected systems, and security teams responsible for vulnerability management should be aware of this vulnerability and take steps to mitigate it. This includes updating to version 1.4.0 or later, and ensuring that the SDK is properly configured and secured.

Technical summary

The vulnerability is caused by a missing check in the CodegenDataModelProvider::Invoke function, which allows an attacker to send an InvokeCommandRequest to a nonexistent endpoint and cluster, causing a VerifyOrDie failure and resulting in a crash (SIGABRT). The issue has been fixed in a later revision (PR #37207). Affected products using Matter SDK (connectedhomeip) before version 1.4.0 are at risk of exploitation. The vulnerability has a CVSS score of 7.5 and is considered HIGH severity.

Defensive priority

High

Recommended defensive actions

  • Update to version 1.4.0 or later of the Matter SDK (connectedhomeip)
  • Ensure that the SDK is properly configured and secured
  • Monitor for and respond to potential attacks on the SDK
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was reported and fixed in a later revision (PR #37207). The CVE record was published on 2026-07-14T23:17:27.593Z and modified on 2026-07-17T03:19:43.137Z. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify affected deployments and review official advisories for specific guidance.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T23:17:27.593Z and has not been modified since then.