Bug 2389492 (CVE-2025-38570)

Summary: CVE-2025-38570 kernel: eth: fbnic: unlink NAPIs from queues on error to open
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-08-19 18:03:52 UTC 
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.
Comment 1 Jon Moroney 2025-08-19 22:24:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025081910-CVE-2025-38570-b790@gregkh/T