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Vulnerability DatabaseCVE-2023-53356
CVE-2023-53356:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2023-53356 is a vulnerability discovered in the Linux kernel affecting the USB gadget serial driver. The vulnerability was published on September 17, 2025, and involves a null pointer dereference issue in the gserial_suspend function (NVD).
Technical details
The vulnerability occurs in the USB gadget serial driver when gserialdisconnect has already cleared gser->ioport and gserialsuspend is called afterwards, leading to a null pointer dereference. The issue was resolved by adding a null pointer check and implementing a static spinlock to prevent gser->ioport from becoming null after the check (Ubuntu).
Impact
The vulnerability could potentially lead to system crashes or denial of service conditions when exploited, as null pointer dereferences typically result in kernel panics in Linux systems (NVD).
Mitigation and workarounds
Multiple Linux distributions have released patches to address this vulnerability. Ubuntu has fixed the issue in various kernel versions, including linux-hwe-5.15 (5.15.0-86.96~20.04.1), linux-kvm (5.15.0-1044.49), and linux-azure (5.15.0-1049.56) (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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