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CVE-2023-53551

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Add null pointer check in gserial_resume Consider a case where gserial_disconnect has already cleared gs…

Published Oct 4, 2025CWE-476EPSS 0.16%

Overview

CVE-2023-53551 is a medium-severity vulnerability. It was published on October 4, 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: gadget: u_serial: Add null pointer check in gserial_resume

Consider a case where gserial_disconnect has already cleared

gser->ioport. And if a wakeup interrupt triggers afterwards,

gserial_resume gets called, which will lead to accessing of

gser->ioport and thus causing null pointer dereference.Add

a null pointer check to prevent this.

Added a static spinlock to prevent gser->ioport from becoming

null after the newly added check.

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/3b24c980dc07be4550a9d1450ed7057f882530e5Refgit.kernel.org/stable/c/44e004f757a7ae13dfebaadbcfdb1a6f98c10377Refgit.kernel.org/stable/c/5ec63fdbca604568890c577753c6f66c5b3ef0b5Refgit.kernel.org/stable/c/c5360eec648bd506afa304ae4a71f82e13d41897Refgit.kernel.org/stable/c/ec357cd3e8af614855d286dd378725cdc7264df6

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53551?

CVE-2023-53551 is a medium-severity vulnerability. It was published on October 4, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53551?

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-2023-53551?

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-2023-53551?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53551 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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