Service interruption via ASP out-of-bounds reads
Published May 9, 2023 · Updated Jan 27, 2025
Out-of-bounds reads in AMD Secure Processor firmware on affected Ryzen processors allow attackers to interrupt processor operation. The ASP accepts insufficiently validated input from compromised System Management Mode code and reads beyond the intended memory boundary. Exploitation requires prior control of SMM, a highly privileged firmware context, and the reported consequence is denial of service rather than data disclosure or code execution.
Summary
What happened
Out-of-bounds reads in AMD Secure Processor firmware on affected Ryzen processors allow attackers to interrupt processor operation. The ASP accepts insufficiently validated input from compromised System Management Mode code and reads beyond the intended memory boundary. Exploitation requires prior control of SMM, a highly privileged firmware context, and the reported consequence is denial of service rather than data disclosure or code execution.
The record
- CVE
- CVE-2021-46765
- Published
- May 9, 2023
- Updated
- Jan 27, 2025
- Vendor
- AMD
- Product
- Ryzen 5000 Series Mobile Processors with Radeon Graphics (Lucienne)
- Classifications
- CWE-125, T1499
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- May 9, 2023CVE publishedPublication date reported by the CVE source.
- Jan 27, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=various
What conditions does exploitation require?
What is affected?
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.
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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