CVE-2022-49654

net: dsa: qca8k: reset cpu port on MTU change

Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: qca8k: reset cpu port on MTU change It was discovered that the Documentation lacks of a fundamental detail on how to correctly change the MAX_FRAME_SIZE of the switch. In fact if the MAX_FRAME_SIZE is changed while the cpu port is on, the switch panics and cease to send any packet. This cause the mgmt ethernet system to not receive any packet (the slow fallback still works) and makes the device not reachable. To recover from this a switch reset is required. To correctly handle this, turn off the cpu ports before changing the MAX_FRAME_SIZE and turn on again after the value is applied.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/188c798f3c2554fa0d7147e9b97baf144b817019
https://git.kernel.org/stable/c/1993f5a06736ada59dd54b50dc96755a38796ee5
https://git.kernel.org/stable/c/386228c694bf1e7a7688e44412cb33500b0ac585

Frequently Asked Questions

What is the severity of CVE-2022-49654?: CVE-2022-49654 has not yet been assigned a CVSS score.
How to fix CVE-2022-49654?: To fix CVE-2022-49654, 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-2022-49654 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49654 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-2022-49654?: CVE-2022-49654 affects Linux Linux, Linux Linux.

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