Description

No cwe for this issue in AMD Zen allows an authorized attacker to disclose information locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.6",
  "pubDate": "2026-08-11T17:18:07.263Z",
  "pubdate": "2026-08-11T17:18:07.263Z",
  "executiveSummary": "An information disclosure vulnerability has been identified within AMD Zen processor architectures. This security flaw allows an authorized local attacker to bypass isolation boundaries and disclose sensitive information residing in system memory or hardware registers. The vulnerability affects AMD Zen products and does not possess a specific assigned Common Weakness Enumeration identifier within the provided intelligence. The primary risk implication centers on the potential leakage of confidential data, cryptographic material, or internal system state to unauthorized entities operating on the local host. Exploitation of this vulnerability requires the attacker to be authorized and capable of executing code locally on the target system, meaning remote exploitation vectors are absent based on the provided parameters. The attack flow relies on localized execution where the threat actor interacts with the vulnerable hardware architecture to extract unauthorized data disclosures. Mitigation strategies must focus on applying vendor-supplied microcode updates, restricting local user privileges, and implementing system hardening practices to limit unauthorized local execution and minimize the potential attack surface.",
  "technicalDetails": "The vulnerability resides within the hardware architecture and microarchitectural design of AMD Zen processors. The root cause stems from insufficient hardware-level isolation or improper handling of internal state access controls, which under specific conditions permits unauthorized local readout of sensitive data structures. The affected component is the AMD Zen processor architecture itself, specifically impacting systems utilizing affected versions of these processors where local execution context can interact with vulnerable hardware routines. Regarding authentication and privilege requirements, the threat actor must be an authorized user with local access to the target system, allowing them to execute custom payloads or interact with low-level system interfaces. The network exposure is strictly local; the vulnerability cannot be exploited remotely over a network protocol. The attack flow proceeds as follows: First, the authorized attacker establishes execution privileges on the target host operating system. Second, the attacker formulates and executes a localized payload designed to probe the vulnerable microarchitectural components or initiate unauthorized read operations against hardware registers or shared internal buffers. Third, due to the absence of robust enforcement mechanisms in the affected AMD Zen hardware logic, the system fails to adequately validate or restrict the request. Finally, the payload successfully retrieves the targeted sensitive information, resulting in local information disclosure. The post-exploitation impact includes the potential exposure of cryptographic keys, process memory fragments, or kernel-level data structures, which could facilitate subsequent privilege escalation or lateral movement within the compromised local environment."
}