CVE-2026-40337

{
  "id": "CVE-2026-40337",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-18T00:16:37.667",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Sentry kernel is a high security level micro-kernel implementation made for high security embedded systems. A given task with one of the DEV or IO capability is able to interact with another task's IRQ line through the __sys_int_* syscall familly. Prior to version 0.4.7, this can lead to DoS and covert-channels between this task and the outer world. A patch is available in version 0.4.7. As a workaround, reduce tasks that have the DEV and IO capability to a single one."
    },
    {
      "lang": "es",
      "value": "El kernel Sentry es una implementación de micro-kernel de alto nivel de seguridad hecha para sistemas embebidos de alta seguridad. Una tarea dada con una de las capacidades DEV o IO es capaz de interactuar con la línea IRQ de otra tarea a través de la familia de syscalls __sys_int_*. Antes de la versión 0.4.7, esto puede llevar a DoS y canales encubiertos entre esta tarea y el mundo exterior. Un parche está disponible en la versión 0.4.7. Como solución alternativa, reduzca las tareas que tienen la capacidad DEV e IO a una sola."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "camelot-os",
          "product": "sentry-kernel",
          "versions": [
            {
              "version": "< 0.4.7",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H",
          "baseScore": 5.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 0.8,
        "impactScore": 4.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-20T16:13:39.095832Z",
          "id": "CVE-2026-40337",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-283"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/camelot-os/sentry-kernel/commit/150b7edd2c5b0da0a8baeed3135ddde613b08081",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/camelot-os/sentry-kernel/pull/108",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/camelot-os/sentry-kernel/security/advisories/GHSA-5hgv-rg2f-79pg",
      "source": "[email protected]"
    }
  ]
}