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CVE-2026-29648

HIGH

8.8

Description

In OpenXiangShan NEMU, when Smstateen is enabled, clearing mstateen0.ENVCFG does not correctly restrict access to henvcfg and senvcfg. As a result, less-privileged code may read or write these CSRs without the required exception, potentially bypassing intended state-enable based isolation controls in virtualized or multi-privilege environments.

CVE Details

CVSS v3.1 Score8.8

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published4/20/2026

Last Modified4/21/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-269

References

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

https://github.com/OpenXiangShan/NEMU/issues/690(cve@mitre.org)

https://github.com/OpenXiangShan/XiangShan/pull/3978(cve@mitre.org)

https://github.com/OpenXiangShan/NEMU/issues/690(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.