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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-25 · updated 2026-09-14

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.

Affected products

• Linux kernel: from 6.8 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4 — fixed in 6.12.96, 6.18.39, 7.1.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.96, 6.18.39, 7.1.4. Check the vendor advisory for mitigations.

References

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

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