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Unrated severityNVD Advisory· Published Sep 23, 2025· Updated Jan 14, 2026

igb: Fix NULL pointer dereference in ethtool loopback test

CVE-2025-39875

Description

In the Linux kernel, the following vulnerability has been resolved:

igb: Fix NULL pointer dereference in ethtool loopback test

The igb driver currently causes a NULL pointer dereference when executing the ethtool loopback test. This occurs because there is no associated q_vector for the test ring when it is set up, as interrupts are typically not added to the test rings.

Since commit 5ef44b3cb43b removed the napi_id assignment in __xdp_rxq_info_reg(), there is no longer a need to pass a napi_id to it. Therefore, simply use 0 as the last parameter.

Affected products

38

Patches

Vulnerability mechanics

References

2

News mentions

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