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Vulnerability DatabaseCVE-2023-53551
CVE-2023-53551:
Linux Kernel vulnerability analysis and mitigation
Overview
A null pointer dereference vulnerability was discovered in the Linux kernel's USB gadget serial driver (CVE-2023-53551). The issue occurs when gserial_disconnect has cleared gser->ioport and a wakeup interrupt triggers afterwards, causing gserial_resume to access the null pointer (NVD, RedHat).
Technical details
The vulnerability exists in the USB gadget serial driver's resume functionality. When gserial_disconnect clears the gser->ioport pointer and a subsequent wakeup interrupt triggers gserial_resume, it leads to a null pointer dereference. The issue has been assigned a CVSS v3.1 score of 4.7 with vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H (RedHat).
Impact
The vulnerability could lead to a system crash due to the null pointer dereference, potentially causing a denial of service condition in affected systems (RedHat).
Mitigation and workarounds
The vulnerability has been fixed by adding a null pointer check in gserial_resume and implementing a static spinlock to prevent gser->ioport from becoming null after the check (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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