Preface: The vulnerability described in AMD-SB-7038 is based on a general microarchitectural behavior: memory reordering and out-of-order execution. These techniques are used by all major CPU vendors (Intel, ARM, etc.) to improve performance.

Background: The bulletin describes a research paper titled “MEMORY DISORDER: Memory Re-orderings as a Timerless Side-channel.”

Key points from AMD’s disclosure:

Nature of the issue:
Researchers demonstrated that memory re-orderings in CPUs and GPUs can be exploited as a timerless side-channel attack.
This means attackers can infer activity in other processes by observing subtle memory ordering patterns—without using timing measurements.

Impact:

• Potential for covert channels (secret communication between processes).
• Possible application fingerprinting (detecting what app is running).
• No direct data corruption or privilege escalation, but information leakage risk.

Scope:

• Applies to mainstream processors, including AMD CPUs and GPUs.
• It’s informational, not an emergency patch scenario. AMD classifies it as low severity because exploitation requires local access and advanced techniques.

Vulnerability details: Please refer to the link for details –

https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7038.html

AMD-SB-7038 is about information leakage via subtle ordering patterns, not about allowing other processes to access memory during waits.

The vulnerability is about memory reordering being observable as a side-channel, not about direct memory access.

Remark: The attacker doesn’t need precise timing; they can infer ordering by observing cache state or contention.

In conclusion, this is a problem common to the entire industry, not unique to AMD. It is not due to any unique defects in its hardware.