CVE-2026-29643

{"id": "CVE-2026-29643", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "published": "2026-04-20T22:16:23.507", "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/issues/3959", "source": "cve@mitre.org"}, {"url": "https://github.com/OpenXiangShan/XiangShan/pull/3966", "source": "cve@mitre.org"}, {"url": "https://github.com/OpenXiangShan/XiangShan/issues/3959", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-703"}]}], "descriptions": [{"lang": "en", "value": "XiangShan (Open-source high-performance RISC-V processor) commit edb1dfaf7d290ae99724594507dc46c2c2125384 (2024-11-28) contains an improper exceptional-condition handling flaw in its CSR subsystem (NewCSR). On affected versions, certain sequences of CSR operations targeting non-existent/custom CSR addresses may trigger an illegal-instruction exception but fail to reliably transfer control to the configured trap handler (mtvec), causing control-flow disruption and potentially leaving the core in a hung or unrecoverable state. This can be exploited by a local attacker able to execute code on the processor to cause a denial of service and potentially inconsistent architectural state."}], "lastModified": "2026-04-21T20:16:40.223", "sourceIdentifier": "cve@mitre.org"}