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The Register
Timer interrupts reopen branch predictor poisoning window, with a working Zen 2 exploit to prove it
The Hacker News
An unprivileged Linux program can time a hardware interrupt to land in the gap between a processor sanitizing its branch predictor and the kernel using it, re-poisoning the predictor after the defense has run. MIT CSAIL researchers Daniël Trujillo and Mengjia Yan named the technique INTERRUPT INJECTION. On an AMD Zen 2 machine running Linux 6.14 with every default Spectre v2 mitigation on,
Bleeping Computer
Microsoft has announced Windows 11 26H1, but it's not for existing PCs. Instead, it will ship on devices with Snapdragon X2 processors and possibly other rumored ARM chips.w [...]
The Hacker News
A team of academics from the CISPA Helmholtz Center for Information Security in Germany has disclosed the details of a new hardware vulnerability affecting AMD processors. The security flaw, codenamed StackWarp, can allow bad actors with privileged control over a host server to run malicious code within confidential virtual machines (CVMs), undermining the integrity guarantees provided by AMD
The Register
Fix landed in July, but OEM firmware updates are required If you use virtual machines, there's reason to feel less-than-Zen about AMD's CPUs. Computer scientists affiliated with the CISPA Helmholtz Center for Information Security in Germany have found a vulnerability in AMD CPUs that exposes secrets in its secure virtualization environment.…
Bleeping Computer
Academic researchers developed a side-channel attack called TEE.Fail, which allows extracting secrets from the trusted execution environment in the CPU, the highly secure area of a system, such as Intel's SGX and TDX, and AMD's SEV-SNP. [...]
Bleeping Computer
A new Spectre-like attack dubbed VMScape allows a malicious virtual machine (VM) to leak cryptographic keys from an unmodified QEMU hypervisor process running on modern AMD or Intel CPUs. [...]
The Register
AMD Zen hardware and Intel Coffee Lake affected If you thought the world was done with side-channel CPU attacks, think again. ETH Zurich has identified yet another Spectre-based transient execution vulnerability that affects AMD Zen CPUs and Intel Coffee Lake processors by breaking virtualization boundaries.…
The Hacker News
Semiconductor company AMD is warning of a new set of vulnerabilities affecting a broad range of chipsets that could lead to information disclosure. The attacks, called Transient Scheduler Attacks (TSA), manifests in the form of a speculative side channel in its CPUs that leverages execution timing of instructions under specific microarchitectural conditions. "In some cases, an attacker may be