Topic: speculative execution
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VMScape Attack Breaks CPU Isolation on AMD and Intel Systems
A new security vulnerability called VMScape allows a malicious virtual machine to extract sensitive data like cryptographic keys from a QEMU hypervisor on both AMD and Intel processors, bypassing existing Spectre mitigations. The attack exploits shared branch prediction structures, enabling a gue...
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Ubuntu boosts performance 20% by disabling Intel GPU security fixes
Ubuntu will disable certain Spectre vulnerability mitigations for Intel-based systems, potentially boosting graphics performance by up to 20%. The decision was made after tests showed the security measures had minimal benefits but significantly impacted Intel GPU workloads. The change will roll o...
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