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CVE-2026-29647 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

In OpenXiangShan NEMU, insufficient Smstateen permission enforcement allows lower-privileged code to access IMSIC state via stopei/vstopei CSRs even when mstateen0.IMSIC is cleared, potentially enabling cross-context information leakage or disruption of interrupt handling.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.5 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

CNA: CISA-ADPCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/OpenXiangShan/NEMU/issues/691	CISA-ADP	ExploitIssue TrackingTechnical DescriptionVendor
https://docs.riscv.org/reference/isa/priv/smstateen.html#state-enable-0-registers	[email protected]
https://github.com/OpenXiangShan/NEMU/issues/691	[email protected]	ExploitIssue TrackingTechnical DescriptionVendor
https://github.com/OpenXiangShan/XiangShan/pull/3978	[email protected]	Source CodeVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-269	Improper Privilege Management	CISA-ADP

Affected Products

Product	Versions
OpenXiangShan NEMU	All versions
CPE No CPEs found in CPE dictionary for this product. Remediation No remediation found in references.
RISC-V Smstateen	All versions
CPE No CPEs found in CPE dictionary for this product. Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 21, 2026	CVE Modified	CISA-ADP
Apr 20, 2026	New CVE Received	[email protected]