VulnerabilityPublished 25 Jul 2026Updated 6 Nov 2026

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

Affects Linux kernelSource CVE Database V5

Compare

Not known to be exploited · fixed in d65fe42820b890a6a4644de0a95a812471f79ad3 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in d65fe42820b890a6a4644de0a95a812471f79ad3, badc53620fe813b3a9f727ef9526f98567c2c898, a8803c4f0ac3fa7df5551bbb5a8800c434a94357 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < d65fe42820b890a6a4644de0a95a812471f79ad3	Fixed in d65fe42820b890a6a4644de0a95a812471f79ad3
LinuxLinux	Affected ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < badc53620fe813b3a9f727ef9526f98567c2c898	Fixed in badc53620fe813b3a9f727ef9526f98567c2c898
LinuxLinux	Affected ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < a8803c4f0ac3fa7df5551bbb5a8800c434a94357	Fixed in a8803c4f0ac3fa7df5551bbb5a8800c434a94357
LinuxLinux	Affected ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < 5828517d17eda27f21d29ea14800c9e0a57bad11	Fixed in 5828517d17eda27f21d29ea14800c9e0a57bad11
LinuxLinux	Affected ≥ 85a79da286b65ae2238a22ac901a0039779e613e, < 712f3268a62d0df98a7ee991cba963ced2e58007	Fixed in 712f3268a62d0df98a7ee991cba963ced2e58007
LinuxLinux	Affected ≥ 28877977bbc4f44dd3068b74ee781466c597a3b3, < 204b9645536bb4a77a2cb35e6519dbf9f4ea1665	Fixed in 204b9645536bb4a77a2cb35e6519dbf9f4ea1665

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.

References

Community reviews

Loading reviews…