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Unrated severityNVD Advisory· Published Sep 17, 2025· Updated Jan 14, 2026

usb: gadget: u_serial: Add null pointer check in gserial_suspend

CVE-2023-53356

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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Affected products

158

Patches

Vulnerability mechanics

References

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