5.5

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

Modified
AliasesUBUNTU-CVE-2026-64321DEBIAN-CVE-2026-64321
Published 25-07-2026Last modified 14-09-2026

Vulnerability summary

CVE-2026-64321 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.12%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 19 · Related 19
OPENSUSE-SU-2026:11476-1OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23881-1SUSE-SU-2026:23887-1SUSE-SU-2026:23897-1SUSE-SU-2026:23902-1

Timeline

  1. 25-07-2026
    PublishedVulnerability first disclosed.
  2. 14-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.12% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu142 products
  • linuxAll versions (No fix recorded) | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.12.96-1 | < 7.1.4-1
  • linux-6.12< 6.12.100-1~deb12u1
Linux2 products
  • linux≥ 28877977bbc4f44dd3068b74ee781466c597a3b3, < 204b9645536bb4a77a2cb35e6519dbf9f4ea1665 | ≥ bd3f40fdec552f9200e7b8521ef02b578c9ee8b0, < 00eaa58988d35fd47ca8811f7f72871591f61ffb | ≥ 85a79da286b65ae2238a22ac901a0039779e613e, < 712f3268a62d0df98a7ee991cba963ced2e58007 | ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < d65fe42820b890a6a4644de0a95a812471f79ad3 | ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < a8803c4f0ac3fa7df5551bbb5a8800c434a94357 | ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < 5828517d17eda27f21d29ea14800c9e0a57bad11 | ≥ 31deaeb11ba7a885116c9c30892b9f763c04d59c, < badc53620fe813b3a9f727ef9526f98567c2c898 | 6.8
  • linux_kernel≥ 6.8, < 6.12.96 | ≥ 6.13, < 6.18.39 | ≥ 6.19, < 7.1.4

3 vendors · 146 products

References

24 links
Show all 24 references