← Retour aux CVEs
CVE-2026-29649
CRITICAL9.8
Description
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).
Details CVE
Score CVSS v3.19.8
SeveriteCRITICAL
Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vecteur d'attaqueNETWORK
ComplexiteLOW
Privileges requisNONE
Interaction utilisateurNONE
Publie4/20/2026
Derniere modification4/21/2026
Sourcenvd
Observations honeypot0
Faiblesses (CWE)
CWE-693
References
https://docs.riscv.org/reference/isa/priv/hypervisor.html(cve@mitre.org)
https://docs.riscv.org/reference/isa/priv/machine.html(cve@mitre.org)
https://github.com/OpenXiangShan/NEMU/issues/681(cve@mitre.org)
https://github.com/OpenXiangShan/NEMU/pull/689(cve@mitre.org)
Correlations IOC
Aucune correlation enregistree
This product uses data from the NVD API but is not endorsed or certified by the NVD.