CVE-2026-29648

Published: Apr 20, 2026Modified: Apr 21, 2026Deferred

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Related CWEs

CWE-269

Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

References (4)

https://docs.riscv.org/reference/isa/priv/smstateen.html

Source: cve@mitre.org

https://github.com/OpenXiangShan/NEMU/issues/690

Source: cve@mitre.org

https://github.com/OpenXiangShan/XiangShan/pull/3978

Source: cve@mitre.org

https://github.com/OpenXiangShan/NEMU/issues/690

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.