Bug 2420413 (CVE-2025-40342)

Summary: CVE-2025-40342 kernel: nvme-fc: use lock accessing port_state and rport state
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-09 05:01:44 UTC 
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.
Comment 1 Alexander B 2025-12-09 14:05:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120912-CVE-2025-40342-a237@gregkh/T