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Review reviewCritical

CVE-2025-40343

Linux

In the Linux kernel, the following vulnerability has been resolved: nvmet-fc: avoid scheduling association deletion twice When forcefully shutting down a port via the configfs interface, nvmet_port_subsys_drop_link() first calls nvmet_port_del_ctrls() and then nvmet_disable_port(). Both functions will eventually schedule all remaining associations for deletion. The current implementation checks whether an association is about to be removed, but only after the work item has already been scheduled. As a result, it is possible for the first scheduled work item to free all resources, and then f...

CVSS
9.8
EPSS
0.58%
44.5% percentile
CISA KEV
Not listed
Published
2025.12.10
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.58%
Technical severityCVSS 9.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: nvmet-fc: avoid scheduling association deletion twice When forcefully shutting down a port via the configfs interface, nvmet_port_subsys_drop_link() first calls nvmet_port_del_ctrls() and then nvmet_disable_port(). Both functions will eventually schedule all remaining associations for deletion. The current implementation checks whether an association is about to be removed, but only after the work item has already been scheduled. As a result, it is possible for the first scheduled work item to free all resources, and then f...

Affected product and versions

Product
Linux
Affected versions
>= a07b4970f464f13640e28e16dad6cfa33647cc99 < 2f4852db87e25d4e226b25cb6f652fef9504360e, >= a07b4970f464f13640e28e16dad6cfa33647cc99 < 85e2ce1920cb511d57aae59f0df6ff85b28bf04d, >= a07b4970f464f13640e28e16dad6cfa33647cc99 < 601ed47b2363c24d948d7bac0c23abc8bd459570, >= a07b4970f464f13640e28e16dad6cfa33647cc99 < 04d17540ef51e2c291eb863ca87fd332259b2d40, >= a07b4970f464f13640e28e16dad6cfa33647cc99 < c09ac9a63fc3aaf4670ad7b5e4f5afd764424154, >= a07b4970f464f13640e28e16dad6cfa33647cc99 < f2537be4f8421f6495edfa0bc284d722f253841d, >= 4.8
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2025-40343 — Linux | SECUFOCUS NOW