CVE-2025-40343
Vulnerability Scoring
Analysis In Progress
CVE-2025-40343 Vulnerability Analysis & Exploit Details
CVE-2025-40343
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2025-40343 Details
Status: Awaiting Analysis
Published on: 09 Dec 2025, 16:17 UTC
CVSS Release:
CVE-2025-40343 Vulnerability Summary
CVE-2025-40343: 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 for the same work item to be scheduled again for deletion. Because the association list is an RCU list, it is not possible to take a lock and remove the list entry directly, so it cannot be looked up again. Instead, a flag (terminating) must be used to determine whether the association is already in the process of being deleted.
Assessing the Risk of CVE-2025-40343
Access Complexity Graph
The exploitability of CVE-2025-40343 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2025-40343
No exploitability data is available for CVE-2025-40343.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2025-40343, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2025-40343, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2025-40343 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40343 does not impact data integrity.
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Availability:
None
CVE-2025-40343 does not affect system availability.
CVE-2025-40343 References
External References
- https://git.kernel.org/stable/c/04d17540ef51e2c291eb863ca87fd332259b2d40
- https://git.kernel.org/stable/c/2f4852db87e25d4e226b25cb6f652fef9504360e
- https://git.kernel.org/stable/c/601ed47b2363c24d948d7bac0c23abc8bd459570
- https://git.kernel.org/stable/c/85e2ce1920cb511d57aae59f0df6ff85b28bf04d
- https://git.kernel.org/stable/c/c09ac9a63fc3aaf4670ad7b5e4f5afd764424154
- https://git.kernel.org/stable/c/f2537be4f8421f6495edfa0bc284d722f253841d
CWE Common Weakness Enumeration
Unknown
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