CVE-2026-89531

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

svcrdma: Reject connection when transport allocation fails

handle_connect_req() returns without action when

svc_rdma_create_xprt() fails to allocate the new transport.

The CM core returns 0 for CONNECT_REQUEST events, so it does

not destroy the new rdma_cm_id. Each allocation failure under

memory pressure leaks one rdma_cm_id, and a remote peer driving

connection attempts can amplify this.

Reject the connection by returning a non-zero status from the

CM event handler, which tells the CM core to destroy the

orphaned cm_id.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References