CVE-2024-42142

net/mlx5: E-switch, Create ingress ACL when needed

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: E-switch, Create ingress ACL when needed Currently, ingress acl is used for three features. It is created only when vport metadata match and prio tag are enabled. But active-backup lag mode also uses it. It is independent of vport metadata match and prio tag. And vport metadata match can be disabled using the following devlink command: # devlink dev param set pci/0000:08:00.0 name esw_port_metadata \ value false cmode runtime If ingress acl is not created, will hit panic when creating drop rule for active-backup lag mode. If always create it, there will be about 5% performance degradation. Fix it by creating ingress acl when needed. If esw_port_metadata is true, ingress acl exists, then create drop rule using existing ingress acl. If esw_port_metadata is false, create ingress acl and then create drop rule.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.05%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/bc3ff8d3c05044de57865ebbb78cca8f7da3e595	patch
https://git.kernel.org/stable/c/3e3551f8702978cd2221d2614ca6d6727e785324	patch
https://git.kernel.org/stable/c/83bc1a129f7fd0d7d05036ceb7ee69102624e320	patch
https://git.kernel.org/stable/c/b20c2fb45470d0c7a603613c9cfa5d45720e17f2	patch

Frequently Asked Questions

What is the severity of CVE-2024-42142?: CVE-2024-42142 has been scored as a medium severity vulnerability.
How to fix CVE-2024-42142?: To fix CVE-2024-42142, 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-2024-42142 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-42142 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-2024-42142?: CVE-2024-42142 affects Linux Linux, Linux Linux.

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