CVE-2021-46916

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb02e5a0ebb172c8276cea3151942aac681f7a4a6 < 758d19098df4b0bbca9f40d6ae6c82c9c18b9bbaaffected
LinuxLinuxb02e5a0ebb172c8276cea3151942aac681f7a4a6 < 31166efb1cee348eb6314e9c0095d84cbeb66b9daffected
LinuxLinux5.11affected
LinuxLinux0 < 5.11unaffected
LinuxLinux5.11.16 <= 5.11.*unaffected
LinuxLinux5.12 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References