CVE-2026-29649

UNKNOWN 0.0

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

NEMU contains an implementation flaw in its RISC-V Hypervisor CSR handling where henvcfg[7:4] (CBIE/CBCFE/CBZE-related fields) is incorrectly masked/updated based on menvcfg[7:4], so a machine-mode write to menvcfg can implicitly modify the hypervisor's environment configuration. This can lead to incorrect enforcement of virtualization configuration and may cause unexpected traps or denial of service when executing cache-block management instructions in virtualized contexts (V=1).

Vendor	n/a
Product	n/a
Published	Apr 20, 2026
Last Updated	Apr 20, 2026

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Affected Versions

n/a / n/a

n/a

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/OpenXiangShan/NEMU/issues/681 github.com: https://github.com/OpenXiangShan/NEMU/pull/689 docs.riscv.org: https://docs.riscv.org/reference/isa/priv/machine.html docs.riscv.org: https://docs.riscv.org/reference/isa/priv/hypervisor.html