EUVD-2026-56555
GHSA-cx8r-g3c8-jcfg
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local access with high complexity (requires sustained timing observation and statistical analysis); low privilege because a co-resident unprivileged process suffices; no availability impact.
Primary rating from Vendor (amd).
CVSS VectorVendor: amd
Lifecycle Timeline
2DescriptionCVE.org
Observable Timing Discrepancy in the AMD Vitis Libraries ECDSA secp256k1 component could allow attackers with local access to potentially perform timing analysis or electromagnetic emanation attacks, resulting in high confidentiality and integrity impact due to the exposure of private cryptographic keys.
AnalysisAI
Timing side-channel in AMD Vitis Libraries' ECDSA secp256k1 Security Module exposes private cryptographic keys to local attackers via statistical analysis of operation timing or electromagnetic emanations. Affected are versions prior to 2026.1 of the Vitis Libraries Security Module and Vitis Unified Installer for FPGAs and Adaptive SoCs on Windows. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Local process-level access to the same host running the AMD Vitis Libraries ECDSA secp256k1 Security Module is required, consistent with the CVSS 4.0 AV:L rating. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N) scores 8.5, reflecting that local access alone - with no privilege requirement - is sufficient precondition, and that key recovery yields both high confidentiality and integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to upgrade to AMD Vitis Libraries Security Module version 2026.1 and Vitis Unified Installer version 2026.1, as documented in AMD security bulletin AMD-SB-8015 (https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-8015.html). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running AMD Vitis Libraries versions prior to 2026.1, with priority given to development systems implementing ECDSA secp256k1 operations. …
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Same weakness CWE-208 – Observable Timing Discrepancy
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External POC / Exploit Code
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