CVE-2023-53356
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-17

Last updated on: 2025-12-11

Assigner: kernel.org

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.
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Meta Information
Published
2025-09-17
Last Modified
2025-12-11
Generated
2026-06-16
AI Q&A
2025-09-17
EPSS Evaluated
2026-06-14
NVD
CVE-2023-53356
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 5.8 (inc) to 5.10.188 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.121 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.39 (exc)
linux linux_kernel From 6.2 (inc) to 6.4.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability occurs in the Linux kernel's usb gadget serial driver (u_serial). If the gserial_disconnect function has cleared the gser->ioport pointer and then gserial_suspend is called afterward, the code attempts to access gser->ioport, which is now null. This leads to a null pointer dereference, potentially causing a kernel crash or instability. The fix involved adding a null pointer check and a static spinlock to prevent gser->ioport from becoming null after the check.

Impact Analysis

This vulnerability can cause a null pointer dereference in the Linux kernel, which may lead to a kernel crash or system instability. This could result in denial of service or unexpected behavior on systems using the affected usb gadget serial driver.

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