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CVE-2021-47560

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CVE-2021-47560

Published: May 24, 2024

Modified: May 11, 2026

PUBLISHED

Description

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not the CPU port (local port 0), which exists, but lacks a netdev. This can result in a NULL pointer dereference when calling netif_carrier_{on,off}(). Fix this by bailing early when processing an event reported for the CPU port. Problem was only observed when running on top of a buggy emulator.

VendorProductVersions

Linux

Linux

affected
28b1987ef5064dd5c43538ba1168ef7b801f3cad - < 90d0736876c50ecde1a3275636a06b9ddb1cace9
affected
28b1987ef5064dd5c43538ba1168ef7b801f3cad - < da4d70199e5d82da664a80077508d6c18f5e76df
affected
28b1987ef5064dd5c43538ba1168ef7b801f3cad - < 63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047

Linux

Linux

affected
5.4
unaffected
0 - < 5.4
unaffected
5.10.83 - <= 5.10.*
unaffected
5.15.6 - <= 5.15.*
unaffected
5.16 - <= *

References

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