CVE-2026-63936
Description
A flaw was found in the Linux kernel's MediaTek MT6359 Analog-to-Digital Converter (ADC) driver. The mt6358_read_imp() function does not properly check the return value of a read operation. If the read fails, an uninitialized variable is used, which can lead to the leakage of sensitive information from the kernel's memory (stack data leakage). This vulnerability could allow a local attacker to gain access to potentially confidential data.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
If the uninitialized pointer is used in a read operation, an attacker might be able to read sensitive portions of memory.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the uninitialized pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the uninitialized pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
