Guest-triggered service interruption via SMU out-of-bounds read
Published Aug 31, 2026 · Updated Sep 1, 2026
Out-of-bounds read in the SMU of AMD Radeon PRO V620 allows guest OS users to interrupt GPU service via a malicious virtual function. Certain SMU command handlers use a virtual-function-supplied array index without ensuring that it identifies a valid array element. Low-privileged code in a guest VM must control a virtual function; the documented consequence is availability loss without confidentiality or integrity impact.
Summary
What happened
Out-of-bounds read in the SMU of AMD Radeon PRO V620 allows guest OS users to interrupt GPU service via a malicious virtual function. Certain SMU command handlers use a virtual-function-supplied array index without ensuring that it identifies a valid array element. Low-privileged code in a guest VM must control a virtual function; the documented consequence is availability loss without confidentiality or integrity impact.
The record
- CVE
- CVE-2023-31308
- Published
- Aug 31, 2026
- Updated
- Sep 1, 2026
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Radeon™ PRO V620
- Classifications
- CWE-129, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 31, 2026CVE publishedPublication date reported by the CVE source.
- Sep 1, 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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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