CVE-2026-29648
HIGH EPSS 23.6%
Published Apr 20, 20262mo ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
Published Apr 20, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
23.6% 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
- github.com https://github.com/OpenXiangShan/NEMU/issues/690
- 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.