CVE-2025-38381: 
Linux Kernel vulnerability analysis and mitigation

CVE-2025-38381 is a vulnerability discovered in the Linux kernel, specifically affecting the cs40l50-vibra input driver. The vulnerability was disclosed on July 25, 2025, and involves a potential NULL pointer dereference in the cs40l50uploadowt() function (NVD, Red Hat).

The vulnerability stems from the cs40l50uploadowt() function allocating memory via kmalloc() without performing proper allocation failure checks. This oversight could lead to a NULL pointer dereference when the memory allocation fails. The vulnerability has been assigned a CVSS v3.1 score of 5.5 with the vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, indicating a moderate severity level (Red Hat).

The vulnerability could potentially lead to a system crash due to the NULL pointer dereference, affecting system availability. However, the impact is limited as it requires local access to the system and can only cause denial of service without compromising confidentiality or integrity (NVD).

The vulnerability has been resolved by implementing proper error handling in the cs40l50uploadowt() function, specifically by returning -ENOMEM in case of allocation failure. Red Hat has confirmed that their Enterprise Linux versions 6 through 10, including RT variants, are not affected by this vulnerability (Red Hat).