CVEvulnerability
CVE-2026-29646
9.8 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2026-04-20
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-267
Description
In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization.
Related
Weakness · CWE (1)
- CWE-267 Privilege Defined With Unsafe Actions weakness
References
- https://docs.riscv.org/reference/isa/priv/hypervisor.html docs.riscv.org
- https://docs.riscv.org/reference/isa/priv/machine.html docs.riscv.org
- https://docs.riscv.org/reference/isa/priv/supervisor.html docs.riscv.org
- https://docs.riscv.org/reference/isa/unpriv/zicsr.html docs.riscv.org
- https://github.com/OpenXiangShan/NEMU/issues/951 github.com
- https://github.com/OpenXiangShan/NEMU/pull/938 github.com
- https://github.com/OpenXiangShan/NEMU/pull/938/commits/55295c46580456d8d5a9d5736e1fda924b8825ab github.com