CVE-2025-40343
9.8 · CRITICALOverview
CVE-2025-40343 is a critical-severity vulnerability. It was published on December 9, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
References
Frequently Asked Questions
What is CVE-2025-40343?
CVE-2025-40343 is a critical-severity vulnerability. It was published on December 9, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2025-40343?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-40343?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-40343?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-40343 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related CRITICAL CVEs from 2025
View all →Huang Yaoshi Pharmaceutical Management Software through 16.0 allows arbitrary file upload via a .asp
Unrestricted Upload of File with Dangerous Type vulnerability in themeglow JobBoard Job listing job-
An issue was discovered in Aviatrix Controller before 7.1.4191 and 7.2.x before 7.2.4996. Due to the
Unrestricted Upload of File with Dangerous Type vulnerability in jumpdemand 4ECPS Web Forms 4ecps-we
An os command injection vulnerability exists in the touchlist_sync.cgi touchlistsync() functionality
A stack-based buffer overflow vulnerability exists in the touchlist_sync.cgi touchlistsync() functio
A buffer overflow vulnerability exists in the login.cgi Goto_chidx() functionality of Wavlink AC3000
A firmware update vulnerability exists in the login.cgi functionality of Wavlink AC3000 M33A8.V5030.
A static login vulnerability exists in the wctrls functionality of Wavlink AC3000 M33A8.V5030.210505
Multiple OS command injection vulnerabilities exist in the login.cgi set_sys_init() functionality of
Multiple OS command injection vulnerabilities exist in the login.cgi set_sys_init() functionality of
Multiple OS command injection vulnerabilities exist in the login.cgi set_sys_init() functionality of