CVE-2026-43380
Description
A flaw was found in the Linux kernel's hwmon subsystem, specifically within the pmbus/q54sj108a2 driver. This vulnerability, a stack buffer overflow, occurs in the q54sj108a2_debugfs_read function due to incorrect arguments passed to the bin2hex() function. This flaw allows data to be written past the end of a buffer onto the stack, potentially leading to a denial of service or arbitrary code execution.
Understanding the Weakness (CWE)
Integrity,Availability,Confidentiality
Technical Impact: DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands; Read Memory; Modify Memory
If the incorrect calculation is used in the context of memory allocation, then the software may create a buffer that is smaller or larger than expected. If the allocated buffer is smaller than expected, this could lead to an out-of-bounds read or write (CWE-119), possibly causing a crash, allowing arbitrary code execution, or exposing sensitive data.
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