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CVE-2023-53356

5.5 · MEDIUM

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

Published Sep 17, 2025CWE-476EPSS 0.19%

Overview

CVE-2023-53356 is a medium-severity vulnerability. It was published on September 17, 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_suspend

Consider a case where gserial_disconnect has already cleared

gser->ioport. And if gserial_suspend gets called afterwards,

it will lead to accessing of gser->ioport and thus causing

null pointer dereference.

Avoid this by adding a null pointer check. Added a static

spinlock to prevent gser->ioport from becoming null after

the newly added null pointer 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/2788a3553f7497075653210b42e2aeb6ba95e28eRefgit.kernel.org/stable/c/2f6ecb89fe8feb2b60a53325b0eeb9866d88909aRefgit.kernel.org/stable/c/374447e3367767156405bedd230c5d391f4b7962Refgit.kernel.org/stable/c/a8ea7ed644cbf6314b5b0136b5398754b549fb8fRefgit.kernel.org/stable/c/e60a827ac074ce6bd58305fe5a86afab5fce6a04

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53356?

CVE-2023-53356 is a medium-severity vulnerability. It was published on September 17, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53356?

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-2023-53356?

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-2023-53356?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53356 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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