{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-20T20:39:23.730Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://docs.riscv.org/reference/isa/priv/machine.html"
        },
        {
          "url": "https://github.com/OpenXiangShan/NEMU/issues/951"
        },
        {
          "url": "https://github.com/OpenXiangShan/NEMU/pull/938"
        },
        {
          "url": "https://github.com/OpenXiangShan/NEMU/pull/938/commits/55295c46580456d8d5a9d5736e1fda924b8825ab"
        },
        {
          "url": "https://docs.riscv.org/reference/isa/unpriv/zicsr.html"
        },
        {
          "url": "https://docs.riscv.org/reference/isa/priv/supervisor.html"
        },
        {
          "url": "https://docs.riscv.org/reference/isa/priv/hypervisor.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-29646",
    "datePublished": "2026-04-20T00:00:00.000Z",
    "dateReserved": "2026-03-04T00:00:00.000Z",
    "dateUpdated": "2026-04-20T20:39:23.730Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-29646\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2026-04-20T21:16:19.503\",\"lastModified\":\"2026-04-20T21:16:19.503\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In OpenXiangShan NEMU prior to 55295c4, when running with RVH (Hypervisor extension) enabled, a VS-mode guest write to the supervisor interrupt-enable CSR (sie) may be handled incorrectly and can influence machine-level interrupt enable state (mie). This breaks privilege/virtualization isolation and can lead to denial of service or privilege-boundary violation in environments relying on NEMU for correct interrupt virtualization.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://docs.riscv.org/reference/isa/priv/hypervisor.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://docs.riscv.org/reference/isa/priv/machine.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://docs.riscv.org/reference/isa/priv/supervisor.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://docs.riscv.org/reference/isa/unpriv/zicsr.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/OpenXiangShan/NEMU/issues/951\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/OpenXiangShan/NEMU/pull/938\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/OpenXiangShan/NEMU/pull/938/commits/55295c46580456d8d5a9d5736e1fda924b8825ab\",\"source\":\"cve@mitre.org\"}]}}"
  }
}