CVE-2026-29648 | THREATINT

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.

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

References

github.com/OpenXiangShan/NEMU/issues/690 exploit

github.com/OpenXiangShan/NEMU/issues/690

github.com/OpenXiangShan/XiangShan/pull/3978

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

cve.org (CVE-2026-29648)

nvd.nist.gov (CVE-2026-29648)

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