eth: fbnic: unlink NAPIs from queues on error to open (CVE-2025-38570) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2025-38570

eth: fbnic: unlink NAPIs from queues on error to open

Answer in brief

CVE-2025-38570 records a Unknown severity vulnerability in eth: fbnic: unlink NAPIs from queues on error to open. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 19, 2025Updated Aug 5, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=557d02238e05eb66b9aba9a1f90f3a2131c6c887 <21d3f8441c7f317b93ba6a8029610c8b7e3773db \|\| >=557d02238e05eb66b9aba9a1f90f3a2131c6c887 <4b59f9deff3bdb52b223c85048f1d2924803b817 \|\| >=557d02238e05eb66b9aba9a1f90f3a2131c6c887 <4b31bcb025cb497da2b01f87173108ff32d350d2	21d3f8441c7f317b93ba6a8029610c8b7e3773db, 4b59f9deff3bdb52b223c85048f1d2924803b817, 4b31bcb025cb497da2b01f87173108ff32d350d2
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 21d3f8441c7f317b93ba6a8029610c8b7e3773db if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 19, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.