CVE-2021-47560

mlxsw: spectrum: Protect driver from buggy firmware

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9 patch
https://git.kernel.org/stable/c/da4d70199e5d82da664a80077508d6c18f5e76df patch
https://git.kernel.org/stable/c/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047 patch

Frequently Asked Questions

What is the severity of CVE-2021-47560?
CVE-2021-47560 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47560?
To fix CVE-2021-47560, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47560 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-47560 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47560?
CVE-2021-47560 affects Linux Linux, Linux Linux.
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