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CVE-2024-42142

Disclosure Date: July 30, 2024 •
CVE-2024-42142
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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.

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CVSS V3 Severity and Metrics
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General Information

Offensive Application
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OS
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Vulnerable Versions
Linux bc3ff8d3c050
Linux not down converted
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Discovered By
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Vendors

  • Linux

Products

  • Linux
Technical Analysis