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AMD Transient Scheduler Attacks, July 08, 2025 (2025-07-08)
(AMD-SB-7029)

Summary:

AMD discovered several transient scheduler attacks related to the execution timing of instructions under specific microarchitectural conditions while investigating a Microsoft® report titled “Enter, Exit, Page Fault, Leak: Testing Isolation Boundaries for Microarchitectural Leaks”.

AMD has debugged these patterns and identified a speculative side channel affecting AMD CPUs . In some cases, an attacker may be able to use this timing information to infer data from other contexts, resulting in information leakage.

Affected Platforms and BIOS version numbers that contain the fix:

Product BIOS Version with Fix
AMD SP5 Genoa/Turin
S8050TBD
FT65TB8050TBD
GC68AB8056TBD
GC68CB8056TBD
GC68CB8056 (TU)N
TS70AB8056TBD
TS70AB8056 (TU)N
TD76B8058TBD
TS70B8056TBD
TS70B8056 (TU)N
TN85B8261TBD
AMD SP6 Siena
S8040TBD
GC73AB8046TBD
AMD AM5 Raphael
S8016TBD
GX40B8016TBD
HG68B8016TBD
AMD Rome/Milan
S8030TBD
FT65TB8030TBD
S8036TBD
GC68AB8036TBD
TS65AB8036TBD
TS65B8036TBD
TN83B8251TBD
TS75AB8252TBD




 

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