What’s Vulnerable › Vulnerabilities

CVE-2025-40342: nvme-fc: use lock accessing port_state and rport state

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-09 · updated 2026-10-14

Description

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.

Affected products

• Linux kernel: 4.10 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/25f4bf1f7979a7871974fd36c79d69ff1cf4b446
• https://git.kernel.org/stable/c/4253e0a4546138a2bf9cb6acf66b32fee677fc7c
• https://git.kernel.org/stable/c/891cdbb162ccdb079cd5228ae43bdeebce8597ad
• https://git.kernel.org/stable/c/9950af4303942081dc8c7a5fdc3688c17c7eb6c0
• https://git.kernel.org/stable/c/a2f7fa75c4a2a07328fa22ccbef461db76790b55
• https://git.kernel.org/stable/c/de3d91af47bc015031e7721b100a29989f6498a5
• https://git.kernel.org/stable/c/e8cde03de8674b05f2c5e0870729049eba517800

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