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CVE-2023-53049

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: usb: ucsi: Fix NULL pointer deref in ucsi_connector_change() When ucsi_init() fails, ucsi->connector is NULL, yet in case of uc…

Published May 2, 2025CWE-476EPSS 0.20%

Overview

CVE-2023-53049 is a medium-severity vulnerability. It was published on May 2, 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:

usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()

When ucsi_init() fails, ucsi->connector is NULL, yet in case of

ucsi_acpi we may still get events which cause the ucs_acpi code to call

ucsi_connector_change(), which then derefs the NULL ucsi->connector

pointer.

Fix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init()

has succeeded, so that ucsi_connector_change() ignores the events

because UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.

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/1c5abcb13491da8c049f20462189c12c753ba978Refgit.kernel.org/stable/c/7dd27aed9c456670b3882877ef17a48195f21693Refgit.kernel.org/stable/c/7ef0423e43f877a328454059d46763043ce3da44Refgit.kernel.org/stable/c/a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0Refgit.kernel.org/stable/c/f87fb985452ab2083967103ac00bfd68fb182764

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53049?

CVE-2023-53049 is a medium-severity vulnerability. It was published on May 2, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53049?

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-2023-53049?

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-2023-53049?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53049 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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