CVE-2021-46916

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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

ixgbe: Fix NULL pointer dereference in ethtool loopback test

The ixgbe driver currently generates a NULL pointer dereference when performing the ethtool loopback test. This is due to the fact that there isn't a q_vector associated with the test ring when it is setup as interrupts are not normally added to the test rings.

To address this I have added code that will check for a q_vector before returning a napi_id value. If a q_vector is not present it will return a value of 0.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
LinuxLinux>= b02e5a0ebb172c8276cea3151942aac681f7a4a6, < 758d19098df4b0bbca9f40d6ae6c82c9c18b9bba; >= b02e5a0ebb172c8276cea3151942aac681f7a4a6, < 31166efb1cee348eb6314e9c0095d84cbeb66b9d
LinuxLinux5.11

References

Timeline

Published
Feb 27, 2024
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-46916: Medium severity, CVSS 5.5 | Vulnix