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CVE-2026-29646

CRITICAL

9.8

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.

Details CVE

Score CVSS v3.19.8

SeveriteCRITICAL

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie4/20/2026

Derniere modification4/21/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-267

References

https://docs.riscv.org/reference/isa/priv/hypervisor.html(cve@mitre.org)

https://docs.riscv.org/reference/isa/priv/machine.html(cve@mitre.org)

https://docs.riscv.org/reference/isa/priv/supervisor.html(cve@mitre.org)

https://docs.riscv.org/reference/isa/unpriv/zicsr.html(cve@mitre.org)

https://github.com/OpenXiangShan/NEMU/issues/951(cve@mitre.org)

https://github.com/OpenXiangShan/NEMU/pull/938(cve@mitre.org)

https://github.com/OpenXiangShan/NEMU/pull/938/commits/55295c46580456d8d5a9d5736e1fda924b8825ab(cve@mitre.org)

Correlations IOC

Aucune correlation enregistree

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