CVE-2025-38380: 
Linux Kernel vulnerability analysis and mitigation

CVE-2025-38380 is a vulnerability discovered in the Linux kernel's i2c/designware component, specifically related to an initialization issue. The vulnerability was first recorded on April 16, 2025, and publicly disclosed on July 25, 2025. The issue affects various Linux distributions and their kernel packages (NVD, Red Hat).

The vulnerability stems from an initialization issue in the i2cdwxferinit() function. Specifically, while the amdi2cdwxferquirk() function initializes msgs and msgsnum parameters, it fails to initialize the msgwriteidx from the dev context, which is required by i2cdwxfer_init(). This oversight could potentially lead to an out of bounds access of the msgs array. The vulnerability has been assigned a CVSS v3.1 base score of 7.0 with the vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H (Red Hat).

The vulnerability could allow an attacker to perform an out of bounds access of the msgs array in the Linux kernel's i2c/designware component. This could potentially lead to information disclosure, system crashes, or privilege escalation in affected systems (NVD).

The vulnerability has been resolved by initializing msgwriteidx before calling i2cdwxfer_init(). Various Linux distributions have released or are in the process of releasing patches for affected kernel versions. Ubuntu has marked this as a medium priority fix and is actively working on updates for affected systems (Ubuntu).