CVE-2026-29649

The NEMU open-source teaching system simulator contains an implementation flaw in its RISC-V Hypervisor CSR handling. Specifically, the henvcfg[7:4] fields (related to CBIE, CBCFE, and CBZE) are incorrectly masked or updated based on menvcfg[7:4] . This allows a machine-mode write to menvcfg to i...

CVE-2026-29649

NEMU contains an implementation flaw in its RISC-V Hypervisor CSR handling where henvcfg7:4 CBIE/CBCFE/CBZE-related fields is incorrectly masked/updated based on menvcfg7:4, so a machine-mode write to menvcfg can implicitly modify the hypervisor's environment configuration. This can lead to...