CVE-2026-64214 powerpc/time: Remove redundant preempt_disable|enable() calls from arch_irq_work_raise()

In the Linux kernel, the following vulnerability has been resolved: powerpc/time: Remove redundant preemptdisable|enable calls from archirqworkraise A kernel panic is observed when handling machine check exceptions from real mode. BUG: Unable to handle kernel data access on read at...

CVE-2026-64214

CVE-2026-64214 affects the Linux kernel on PowerPC where arch_irq_work_raise() redundantly called preempt_disable()/preempt_enable() while handling machine check exceptions in real mode. The MCE/NMI context is not preemptible, so the extra preemption protection could fault when accessing preempt_...