Private-key exposure via ECDSA timing discrepancy
Published Aug 11, 2026 · Updated Aug 11, 2026
Observable timing discrepancy in AMD Vitis Security Library before 2026.1 allows local users to expose ECDSA secp256k1 private keys. AMD has not published which ECDSA secp256k1 operation varies with secret data or how the timing discrepancy arises. Exploitation requires local timing measurements or sufficiently close access for electromagnetic measurements; recovered keys permit forged signatures.
Summary
What happened
Observable timing discrepancy in AMD Vitis Security Library before 2026.1 allows local users to expose ECDSA secp256k1 private keys. AMD has not published which ECDSA secp256k1 operation varies with secret data or how the timing discrepancy arises. Exploitation requires local timing measurements or sufficiently close access for electromagnetic measurements; recovered keys permit forged signatures.
The record
- CVE
- CVE-2026-43606
- Published
- Aug 11, 2026
- Updated
- Aug 11, 2026
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Unified Installer for FPGAs & Adaptive SoCs
- Classifications
- CWE-208
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 11, 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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