CVE-2026-64555
Description
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.
How to fix
- Linux Linux10a568010e827108d149779908850afaec898846, 884b44256041ec6b2dcbe8e6a67384d26145cba1, dd3b237eb7780d65eae296d3d3a70012b6e7a02f, ff1022c3de46753eb7eba2f6efd990569e66ff95 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 2de451a329cf662beeba71f63c7f83ee24ca6642 ≤ v < 10a568010e827108d149779908850afaec898846, 2de451a329cf662beeba71f63c7f83ee24ca6642 ≤ v < 884b44256041ec6b2dcbe8e6a67384d26145cba1, 2de451a329cf662beeba71f63c7f83ee24ca6642 ≤ v < dd3b237eb7780d65eae296d3d3a70012b6e7a02f, 2de451a329cf662beeba71f63c7f83ee24ca6642 ≤ v < ff1022c3de46753eb7eba2f6efd990569e66ff95, 6.7 | 10a568010e827108d149779908850afaec898846, 884b44256041ec6b2dcbe8e6a67384d26145cba1, dd3b237eb7780d65eae296d3d3a70012b6e7a02f, ff1022c3de46753eb7eba2f6efd990569e66ff95 |
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