CVE-2022-49234

net: dsa: Avoid cross-chip syncing of VLAN filtering

Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: Avoid cross-chip syncing of VLAN filtering Changes to VLAN filtering are not applicable to cross-chip notifications. On a system like this: .-----. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-' '-1-2-' '-1-2-' Before this change, upon sw1p1 leaving a bridge, a call to dsa_port_vlan_filtering would also be made to sw2p1 and sw3p1. In this scenario: .---------. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-3-4-' '-1-2-' '-1-2-' When sw1p4 would leave a bridge, dsa_port_vlan_filtering would be called for sw2 and sw3 with a non-existing port - leading to array out-of-bounds accesses and crashes on mv88e6xxx.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/e1f2a4dd8d433eec393d09273a78a3d3551339cf
https://git.kernel.org/stable/c/108dc8741c203e9d6ce4e973367f1bac20c7192b

Frequently Asked Questions

What is the severity of CVE-2022-49234?: CVE-2022-49234 has not yet been assigned a CVSS score.
How to fix CVE-2022-49234?: To fix CVE-2022-49234, 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-2022-49234 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49234 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-2022-49234?: CVE-2022-49234 affects Linux Linux, Linux Linux.

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