CVE-2026-29647
MEDIUM EPSS 13.8%
Published Apr 20, 20262mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Published Apr 20, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
13.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-269 Improper Privilege Management Authorization
References 3
- docs.riscv.org https://docs.riscv.org/reference/isa/priv/smstateen.html#state-enable-0-registers
- github.com https://github.com/OpenXiangShan/NEMU/issues/691
- github.com https://github.com/OpenXiangShan/XiangShan/pull/3978
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.