Local privilege escalation via unauthenticated SPI ROM update
Published Sep 2, 2026 · Updated Sep 3, 2026
Insufficient authenticity checks in AMD AGESA firmware allow local users to alter SPI ROM data, causing denial of service or privilege escalation. AMD has not disclosed the responsible AGESA routine or exact untrusted input, but states that inadequate authenticity checks permit an SPI ROM update. Exploitation requires local execution on a system with affected platform firmware; the reported outcomes are limited to denial of service or privilege escalation.
Summary
What happened
Insufficient authenticity checks in AMD AGESA firmware allow local users to alter SPI ROM data, causing denial of service or privilege escalation. AMD has not disclosed the responsible AGESA routine or exact untrusted input, but states that inadequate authenticity checks permit an SPI ROM update. Exploitation requires local execution on a system with affected platform firmware; the reported outcomes are limited to denial of service or privilege escalation.
The record
- CVE
- CVE-2023-20576
- Published
- Sep 2, 2026
- Updated
- Sep 3, 2026
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Ryzen Threadripper PRO 5000WX Processors
- Classifications
- CWE-345, T1542.001
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 2, 2026CVE publishedPublication date reported by the CVE source.
- Sep 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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