Service interruption via process-space allocation overflow
Published Sep 6, 2025 · Updated Sep 8, 2025
Integer overflow in AMD Trusted OS on affected processors allows local privileged users to interrupt service through a userspace process. Trusted OS process-space allocation insufficiently validates parameters before calculating the allocation size, permitting the calculation to wrap. Exploitation requires local high privileges and high-complexity input; the documented consequence is availability loss, without confidentiality or integrity impact.
Summary
What happened
Integer overflow in AMD Trusted OS on affected processors allows local privileged users to interrupt service through a userspace process. Trusted OS process-space allocation insufficiently validates parameters before calculating the allocation size, permitting the calculation to wrap. Exploitation requires local high privileges and high-complexity input; the documented consequence is availability loss, without confidentiality or integrity impact.
The record
- CVE
- CVE-2021-26377
- Published
- Sep 6, 2025
- Updated
- Sep 8, 2025
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Ryzen™ Embedded V1000 Series Processors
- Classifications
- CWE-190, T1499
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Sep 6, 2025CVE publishedPublication date reported by the CVE source.
- Sep 8, 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?
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.
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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