FKIE_CVE-2025-63384

Vulnerability from fkie_nvd - Published: 2025-11-10 20:15 - Updated: 2025-11-12 21:15
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
A vulnerability was discovered in RISC-V Rocket-Chip v1.6 and before implementation where the SRET (Supervisor-mode Exception Return) instruction fails to correctly transition the processor's privilege level. Instead of downgrading from Machine-mode (M-mode) to Supervisor-mode (S-mode) as specified by the sstatus.SPP bit, the processor incorrectly remains in M-mode, leading to a critical privilege retention vulnerability.
References
cve@mitre.orghttps://github.com/107040503/RISC-V-Vulnerability-Disclosure_SRET
cve@mitre.orghttps://github.com/chipsalliance/rocket-chip.git
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was discovered in RISC-V Rocket-Chip v1.6 and before implementation where the SRET (Supervisor-mode Exception Return) instruction fails to correctly transition the processor\u0027s privilege level. Instead of downgrading from Machine-mode (M-mode) to Supervisor-mode (S-mode) as specified by the sstatus.SPP bit, the processor incorrectly remains in M-mode, leading to a critical privilege retention vulnerability."
    },
    {
      "lang": "es",
      "value": "Se descubri\u00f3 una vulnerabilidad en RISC-V Rocket-Chip v1.6 y versiones anteriores, donde la instrucci\u00f3n SRET (Supervisor-mode Exception Return) no logra transicionar correctamente el nivel de privilegio del procesador. En lugar de bajar de categor\u00eda desde el modo M\u00e1quina (M-mode) a modo Supervisor (S-mode) seg\u00fan lo especificado por el bit sstatus.SPP, el procesador permanece incorrectamente en M-mode, lo que lleva a una vulnerabilidad cr\u00edtica de retenci\u00f3n de privilegios."
    }
  ],
  "id": "CVE-2025-63384",
  "lastModified": "2025-11-12T21:15:52.220",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-11-10T20:15:49.013",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/107040503/RISC-V-Vulnerability-Disclosure_SRET"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/chipsalliance/rocket-chip.git"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-266"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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