CVE-2026-29649

CVSS 9.8 CRITICALEPSS 0.4%CWE-693

Vexday Risk Score

28Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 9.8EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

20 abr 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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).

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

Produtos afetados

n/a · n/a

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Referências

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