CVE intelligence

CVE-2026-89531

Vulnerability intelligence

Published Sep 11, 2026Sources checked Oct 30, 2026

N/ACVSS not listedScore unavailable

What this means

Review the available evidence

CVE-2026-89531. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Sep 24, 2026

Release Notes

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-89531?

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.

Source: NVD