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": "2026-08-11T17:18:07.100Z",
  "pubdate": "2026-08-11T17:18:07.100Z",
  "executiveSummary": "An information disclosure vulnerability has been identified within AMD Zen processor architectures. The security flaw allows an authenticated local attacker to successfully compromise system confidentiality and read sensitive data from local memory spaces.\nThis vulnerability specifically affects AMD Zen processors. The primary risk implication centers on unauthorized data exposure, where local processes or users with execution privileges may harvest sensitive information that should otherwise remain isolated and protected within hardware or software boundaries.\nThe exploitation of this vulnerability requires an attacker to have local access to the target system and sufficient authorization to execute code. There are no remote network exposure vectors associated with this issue, meaning remote attackers cannot exploit the vulnerability directly without establishing prior local execution context.\nGiven the nature of microarchitectural and local information disclosure vulnerabilities in processor designs, risk mitigation typically relies on applying microcode updates, firmware patches, or software-based mitigations provided by the vendor to enforce proper hardware isolation and prevent unauthorized side-channel or direct data read paths.",
  "technicalDetails": "The vulnerability resides within the AMD Zen processor architecture, affecting the management of local data access and hardware-enforced boundaries. The root cause stems from an unspecified weakness in how the processor handles local state or data isolation, permitting unauthorized local disclosure of information.\nExploitation of this vulnerability requires the attacker to be authenticated and possess local execution capabilities on the target operating system running on the affected AMD Zen hardware. Because the vulnerability is local in nature, there is no direct network attack vector; the attacker must interact directly with the local environment.\nThe attack flow proceeds as follows: First, the authenticated attacker establishes execution context on the host operating system. Second, the attacker leverages the lack of proper hardware or architectural isolation in the vulnerable AMD Zen component. Third, by executing specific instruction sequences or interacting with vulnerable local interfaces, the attacker bypasses intended security controls. Finally, the attacker reads sensitive memory contents or system data, resulting in local information disclosure.\nThe affected component involves the internal processing logic of AMD Zen CPUs where local information handling lacks sufficient restriction for authorized local users. Post-exploitation impact is strictly limited to information disclosure, meaning the attacker can read confidential data but cannot inherently modify system configurations or execute arbitrary administrative actions unless combined with additional privilege escalation vulnerabilities."
}