Local privilege escalation via SMM race condition
Published Nov 14, 2023 · Updated Aug 2, 2024
A race condition in SMM code on affected AMD Ryzen processors allows local users with compromised user space to escalate privileges. AMD has not disclosed the affected SMM routine, shared resource, or exact synchronization failure; it states only that the race leverages CVE-2018-8897. Exploitation requires control of local user space and winning the race, with privilege escalation as the only published consequence.
Summary
What happened
A race condition in SMM code on affected AMD Ryzen processors allows local users with compromised user space to escalate privileges. AMD has not disclosed the affected SMM routine, shared resource, or exact synchronization failure; it states only that the race leverages CVE-2018-8897. Exploitation requires control of local user space and winning the race, with privilege escalation as the only published consequence.
The record
- CVE
- CVE-2023-20571
- Published
- Nov 14, 2023
- Updated
- Aug 2, 2024
- Vendor
- AMD
- Product
- AMD Ryzen 7035 Series Processors with Radeon Graphics (Rembrandt-R)
- Classifications
- CWE-362, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 14, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record 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?
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
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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