CVE-2026-29642

{"id": "CVE-2026-29642", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/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": 1.8}]}, "published": "2026-04-20T21:16:19.393", "references": [{"url": "https://docs.riscv.org/reference/isa/priv/machine.html", "source": "cve@mitre.org"}, {"url": "https://docs.riscv.org/reference/isa/priv/priv-csrs.html", "source": "cve@mitre.org"}, {"url": "https://github.com/OpenXiangShan/XiangShan/commit/5e3dd63", "source": "cve@mitre.org"}, {"url": "https://github.com/OpenXiangShan/XiangShan/issues/3934", "source": "cve@mitre.org"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-1244"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-04-21T20:16:40.063", "sourceIdentifier": "cve@mitre.org"}