CVE-2026-93066 x86/mm/pat: Take cpa_lock around large-page collapse

In the Linux kernel, the following vulnerability has been resolved: x86/mm/pat: Take cpalock around large-page collapse Loading and unloading modules concurrently on several CPUs on a KASAN build, with a short delay injected at the CPA page-table lookup to widen the window, faults within minutes:...