{"api_version":"1","generated_at":"2026-04-21T10:52:34+00:00","cve":"CVE-2026-29648","urls":{"html":"https://cve.report/CVE-2026-29648","api":"https://cve.report/api/cve/CVE-2026-29648.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-29648","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-29648"},"summary":{"title":"CVE-2026-29648","description":"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.","state":"PUBLISHED","assigner":"mitre","published_at":"2026-04-20 21:16:19","updated_at":"2026-04-20 21:16:19"},"problem_types":["n/a"],"metrics":[],"references":[{"url":"https://docs.riscv.org/reference/isa/priv/smstateen.html","name":"https://docs.riscv.org/reference/isa/priv/smstateen.html","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/OpenXiangShan/XiangShan/pull/3978","name":"https://github.com/OpenXiangShan/XiangShan/pull/3978","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/OpenXiangShan/NEMU/issues/690","name":"https://github.com/OpenXiangShan/NEMU/issues/690","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-29648","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-29648","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"n/a","version":"affected n/a","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"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."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2026-04-20T20:07:13.590Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"url":"https://github.com/OpenXiangShan/NEMU/issues/690"},{"url":"https://github.com/OpenXiangShan/XiangShan/pull/3978"},{"url":"https://docs.riscv.org/reference/isa/priv/smstateen.html"}]}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2026-29648","datePublished":"2026-04-20T00:00:00.000Z","dateReserved":"2026-03-04T00:00:00.000Z","dateUpdated":"2026-04-20T20:07:13.590Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-20 21:16:19","lastModifiedDate":"2026-04-20 21:16:19","problem_types":["n/a"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"29648","Ordinal":"1","Title":"CVE-2026-29648","CVE":"CVE-2026-29648","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"29648","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"CVE-2026-29648"}]}}}