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

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64321 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Address refcount leak in nvmet_rdma_queue_connect by releasing device reference on error paths.
  • Apply the provided kernel patch.
  • Ensure proper refcounting in device handling.
  • Test reference count logic thoroughly.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64321.

URL Resource
https://git.kernel.org/stable/c/5828517d17eda27f21d29ea14800c9e0a57bad11
https://git.kernel.org/stable/c/a8803c4f0ac3fa7df5551bbb5a8800c434a94357
https://git.kernel.org/stable/c/badc53620fe813b3a9f727ef9526f98567c2c898
https://git.kernel.org/stable/c/d65fe42820b890a6a4644de0a95a812471f79ad3
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64321 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64321 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64321 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64321 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'd65fe42820b890a6a4644de0a95a812471f79ad3', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'a8803c4f0ac3fa7df5551bbb5a8800c434a94357', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': '5828517d17eda27f21d29ea14800c9e0a57bad11', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'badc53620fe813b3a9f727ef9526f98567c2c898', 'versionType': 'git'}], 'programFiles': ['drivers/nvme/target/rdma.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/nvme/target/rdma.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'd65fe42820b890a6a4644de0a95a812471f79ad3', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'a8803c4f0ac3fa7df5551bbb5a8800c434a94357', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': '5828517d17eda27f21d29ea14800c9e0a57bad11', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'badc53620fe813b3a9f727ef9526f98567c2c898', 'versionType': 'git'}], 'programFiles': ['drivers/nvme/target/rdma.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/nvme/target/rdma.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'd65fe42820b890a6a4644de0a95a812471f79ad3', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'a8803c4f0ac3fa7df5551bbb5a8800c434a94357', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': '5828517d17eda27f21d29ea14800c9e0a57bad11', 'versionType': 'git'}, {'status': 'affected', 'version': '31deaeb11ba7a885116c9c30892b9f763c04d59c', 'lessThan': 'badc53620fe813b3a9f727ef9526f98567c2c898', 'versionType': 'git'}], 'programFiles': ['drivers/nvme/target/rdma.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/nvme/target/rdma.c'], 'defaultStatus': 'affected'}]
    Added 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.
    Added Reference https://git.kernel.org/stable/c/5828517d17eda27f21d29ea14800c9e0a57bad11
    Added Reference https://git.kernel.org/stable/c/a8803c4f0ac3fa7df5551bbb5a8800c434a94357
    Added Reference https://git.kernel.org/stable/c/badc53620fe813b3a9f727ef9526f98567c2c898
    Added Reference https://git.kernel.org/stable/c/d65fe42820b890a6a4644de0a95a812471f79ad3
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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