{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5e3dd63"
            }
          ],
          "repo": "https://github.com/openxiangshan/xiangshan",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29642.json"
  },
  "details": "A local attacker who can execute privileged CSR operations (or can induce firmware to do so) performs carefully crafted reads/writes to menvcfg (e.g., csrrs in M-mode). On affected XiangShan versions (commit aecf601e803bfd2371667a3fb60bfcd83c333027, 2024-11-19), these menvcfg accesses can unexpectedly set WPRI (reserved) bits in the status view (xstatus) to 1. RISC-V defines WPRI fields as \"writes preserve values, reads ignore values,\" i.e., they must not be modified by software manipulating other fields, and menvcfg itself contains multiple WPRI fields.",
  "id": "CVE-2026-29642",
  "modified": "2026-08-12T03:51:13.274523169Z",
  "published": "2026-04-20T00:00:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://docs.riscv.org/reference/isa/priv/machine.html"
    },
    {
      "type": "WEB",
      "url": "https://docs.riscv.org/reference/isa/priv/priv-csrs.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29642.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29642"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/OpenXiangShan/XiangShan/issues/3934"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OpenXiangShan/XiangShan/commit/5e3dd63"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}