PT-2026-65230 · Linux · Linux
CVE-2026-64555
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Publicado
2026-07-27
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Atualizado
2026-07-27
Nenhuma
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In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: nv: Fix SPSR EL2 restore in kvm hyp handle mops()
kvm hyp handle mops() resets the single-step state machine as part of
rewinding state for a MOPS exception by modifying vcpu cpsr() and
writing the result directly into hardware.
In the case of nested virtualization, vcpu cpsr() is a synthetic value
such that the rest of KVM can deal with vEL2 cleanly. That means the
value requires translation before being written into hardware, which is
unfortunately missing from the MOPS handler.
Fix it by directly modifying SPSR EL2 and avoiding the synthetic state
altogether, which will be resynchronized on the next 'full' exit back
to KVM.
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