CVE-2025-38446: 
Linux Kernel vulnerability analysis and mitigation

CVE-2025-38446 is a vulnerability discovered in the Linux kernel, specifically affecting the clock (clk) subsystem for i.MX platforms. The vulnerability was disclosed on July 25, 2025, and involves an out-of-bounds access in the dispmixcsrclkdevdata component (NVD, Ubuntu).

The vulnerability occurs when numparents is 4, where _clkregister() experiences an out-of-bounds access when accessing the parentnames member. The issue stems from using a hardcoded number instead of ARRAY_SIZE() for array bounds checking. This was confirmed through KASAN (Kernel Address Sanitizer) which detected a global-out-of-bounds read of size 8 at address ffff800086988e78 (RedHat). The vulnerability has been assigned a CVSS v3.1 base score of 5.5 with vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (RedHat).

The vulnerability primarily affects system stability and can lead to potential system crashes or denial of service conditions. The out-of-bounds access specifically impacts the clock management subsystem for i.MX platforms, which could result in system instability or crashes when the affected component is triggered (RedHat).

The vulnerability has been patched by replacing the hardcoded number with ARRAY_SIZE() in the affected code. Various Linux distributions have released updates to address this vulnerability. Ubuntu has marked this as a medium priority issue and has provided patches for affected versions (Ubuntu).