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CVE-2025-40342· NVD / CVE Program· CNA Linux

nvme-fc: use lock accessing port_state and rport state

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.36% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 25f4bf1f7979a7871974fd36c79d69ff1cf4b446, 4253e0a4546138a2bf9cb6acf66b32fee677fc7c, 891cdbb162ccdb079cd5228ae43bdeebce8597ad.

Low priority for now. Upgrade to Linux Linux 25f4bf1f7979a7871974fd36c79d69ff1cf4b446, 4253e0a4546138a2bf9cb6acf66b32fee677fc7c, 891cdbb162ccdb079cd5228ae43bdeebce8597ad or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

In the Linux kernel, the following vulnerability has been resolved: nvme-fc: use lock accessing port_state and rport state nvme_fc_unregister_remote removes the remote port on a lport object at any point in time when there is no active association. This races with with the reconnect logic, because nvme_fc_create_association is not taking a lock to check the port_state and atomically increase the active count on the rport.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Dec 9, 2025
Updated
Aug 5, 2026
EPSS
0.4% · 29th percentile
CWE
—

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CNA vs NVD score

NVD
—
CNA · Linux
8.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.10affected
    • e399441de9115cd472b8ace6c517708273ca7997 and later · before de3d91af47bc015031e7721b100a29989f6498a5affected · git
    • e399441de9115cd472b8ace6c517708273ca7997 and later · before e8cde03de8674b05f2c5e0870729049eba517800affected · git
    • e399441de9115cd472b8ace6c517708273ca7997 and later · before 4253e0a4546138a2bf9cb6acf66b32fee677fc7caffected · git
    • e399441de9115cd472b8ace6c517708273ca7997 and later · before 25f4bf1f7979a7871974fd36c79d69ff1cf4b446affected · git
    • e399441de9115cd472b8ace6c517708273ca7997 and later · before 9950af4303942081dc8c7a5fdc3688c17c7eb6c0affected · git
    • e399441de9115cd472b8ace6c517708273ca7997 and later · before a2f7fa75c4a2a07328fa22ccbef461db76790b55affected · git
    • e399441de9115cd472b8ace6c517708273ca7997 and later · before 891cdbb162ccdb079cd5228ae43bdeebce8597adaffected · git
    • before 4.10not affected · semver
    • 5.10.247 and later · up to and including 5.10.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.159-16.1.159-1
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.8-16.17.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
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  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux25f4bf1f7979a7871974fd36c79d69ff1cf4b446Vendor (CNA)
Linux Linux4253e0a4546138a2bf9cb6acf66b32fee677fc7cVendor (CNA)
Linux Linux891cdbb162ccdb079cd5228ae43bdeebce8597adVendor (CNA)
Linux Linux9950af4303942081dc8c7a5fdc3688c17c7eb6c0Vendor (CNA)
Linux Linuxa2f7fa75c4a2a07328fa22ccbef461db76790b55Vendor (CNA)
Linux Linuxde3d91af47bc015031e7721b100a29989f6498a5Vendor (CNA)
Linux Linuxe8cde03de8674b05f2c5e0870729049eba517800Vendor (CNA)
debian:linux6.1.159-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records