CVE-2026-29646 | In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization.
In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization.
- 🔗 docs.riscv.org/reference/isa/priv/machine.html
- 🔗 github.com/OpenXiangShan/NEMU/issues/951
- 🔗 github.com/OpenXiangShan/NEMU/pull/938
- 🔗 github.com/OpenXiangShan/NEMU/pull/938/commits/55295…
- 🔗 docs.riscv.org/reference/isa/unpriv/zicsr.html
- 🔗 docs.riscv.org/reference/isa/priv/supervisor.html
- 🔗 docs.riscv.org/reference/isa/priv/hypervisor.html
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CVE-2026-29646 | In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization.
In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable sta