CVE-2026-29647 | THREATINT

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.

PUBLISHED Reserved 2026-03-04 | Published 2026-04-20 | Updated 2026-04-21 | Assigner mitre

References

github.com/OpenXiangShan/NEMU/issues/691 exploit

github.com/OpenXiangShan/NEMU/issues/691

github.com/OpenXiangShan/XiangShan/pull/3978

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

cve.org (CVE-2026-29647)

nvd.nist.gov (CVE-2026-29647)

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