CVE-2026-29648

{"id": "CVE-2026-29648", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2026-04-20T21:16:19.733", "references": [{"url": "https://docs.riscv.org/reference/isa/priv/smstateen.html", "source": "cve@mitre.org"}, {"url": "https://github.com/OpenXiangShan/NEMU/issues/690", "source": "cve@mitre.org"}, {"url": "https://github.com/OpenXiangShan/XiangShan/pull/3978", "source": "cve@mitre.org"}, {"url": "https://github.com/OpenXiangShan/NEMU/issues/690", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-269"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-04-21T20:16:40.877", "sourceIdentifier": "cve@mitre.org"}