What’s Vulnerable › Vulnerabilities

CVE-2025-38570: eth: fbnic: unlink NAPIs from queues on error to open

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-19 · updated 2026-07-30
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: eth: fbnic: unlink NAPIs from queues on error to open CI hit a UaF in fbnic in the AF_XDP portion of the queues.py test. The UaF is in the __sk_mark_napi_id_once() call in xsk_bind(), NAPI has been freed. Looks like the device failed to open earlier, and we lack clearing the NAPI pointer from the queue.

Affected products

• Linux kernel: from 6.14 before 6.15.10; from 6.16 before 6.16.1 — fixed in 6.15.10, 6.16.1

How to fix

Upgrade to a fixed version: Linux kernel 6.15.10, 6.16.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/21d3f8441c7f317b93ba6a8029610c8b7e3773db
• https://git.kernel.org/stable/c/4b31bcb025cb497da2b01f87173108ff32d350d2
• https://git.kernel.org/stable/c/4b59f9deff3bdb52b223c85048f1d2924803b817

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