CVE-2026-68124
Description
A flaw was found in the Linux kernel's Message Control Transport Protocol (MCTP) serial driver. The driver's receive state machine incorrectly handles zero-length frames, leading to an out-of-bounds write. A local attacker with CAP_NET_ADMIN capabilities can exploit this vulnerability by sending specially crafted zero-length frames, which can result in arbitrary code execution or a denial of service.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
Frequently Asked Questions
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