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CVE-2022-49582

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: dsa: fix NULL pointer dereference in dsa_port_reset_vlan_filtering The "ds" iterator variable used in dsa_port_reset_vlan_…

Published Feb 26, 2025CWE-476EPSS 0.22%

Overview

CVE-2022-49582 is a medium-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

net: dsa: fix NULL pointer dereference in dsa_port_reset_vlan_filtering

The "ds" iterator variable used in dsa_port_reset_vlan_filtering() ->

dsa_switch_for_each_port() overwrites the "dp" received as argument,

which is later used to call dsa_port_vlan_filtering() proper.

As a result, switches which do enter that code path (the ones with

vlan_filtering_is_global=true) will dereference an invalid dp in

dsa_port_reset_vlan_filtering() after leaving a VLAN-aware bridge.

Use a dedicated "other_dp" iterator variable to avoid this from

happening.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1699b4d502eda3c7ea4070debad3ee570b5091b1Refgit.kernel.org/stable/c/3240e12fe203a3a79b9814e83327106b770ed7b0

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49582?

CVE-2022-49582 is a medium-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49582?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49582?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49582?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49582 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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