Description
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.
References7
- docs.riscv.org/reference/isa/priv/hypervisor.html
- docs.riscv.org/reference/isa/priv/machine.html
- docs.riscv.org/reference/isa/priv/supervisor.html
- docs.riscv.org/reference/isa/unpriv/zicsr.html
- github.com/OpenXiangShan/NEMU/issues/951
- github.com/OpenXiangShan/NEMU/pull/938
- github.com/OpenXiangShan/NEMU/pull/938/commits/55295c46580456d8…
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 31 · as of 13 November 2026
- CWE
- CWE-267
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