Subj : [$] Safer speculation-free user-space access
To   : All
From : LWN.net
Date : Thu Oct 23 2025 15:30:09

[$] Safer speculation-free user-space access

Date:
Thu, 23 Oct 2025 14:19:05 +0000

Description:
The Spectre class of hardware vulnerabilities truly is a gift that keeps on
giving.  New variants are still being discovered in current CPUs nearly
eight years after the disclosure of this
problem, and developers are still working to minimize the performance costs
that come from defending against it.  The masked user-space access
mechanism is a case in point: it reduces the cost of defending against some
speculative attacks, but it brought some challenges of its own that are
only now being addressed.

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Link to news story:
https://lwn.net/Articles/1042711/


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