Red Hat: CVE-2021-47560: kernel: mlxsw: spectrum: Protect driver from buggy firmware (Multiple Advisories)
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.
Solution(s)
- redhat-upgrade-kernel
- redhat-upgrade-kernel-rt
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