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CVE-2023-54038

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link

hci_connect_sco currently returns NULL when there is no link (i.e. when hci_conn_link() returns NULL).

sco_connect() expects an ERR_PTR in case of any error (see line 266 in sco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which tries to get hcon->hdev, resulting in dereferencing a NULL pointer as reported by syzkaller.

The same issue exists for iso_connect_cis() calling hci_connect_cis().

Thus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR instead of NULL.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-54038",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "06149746e7203d5ffe2d6faf9799ee36203aa8b8",
              "lessThan": "357ab53c83a5322437fa434e9a9e3e0bafe6b383",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "06149746e7203d5ffe2d6faf9799ee36203aa8b8",
              "lessThan": "b4066eb04bb67e7ff66e5aaab0db4a753f37eaad",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f72fc94a17d45be98aecfd59c39b5b24a6a342e2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.3.8",
              "lessThan": "6.4",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "net/bluetooth/hci_conn.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.4",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.4.7",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/bluetooth/hci_conn.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T11:15:56.793",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/357ab53c83a5322437fa434e9a9e3e0bafe6b383",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b4066eb04bb67e7ff66e5aaab0db4a753f37eaad",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link\n\nhci_connect_sco currently returns NULL when there is no link (i.e. when\nhci_conn_link() returns NULL).\n\nsco_connect() expects an ERR_PTR in case of any error (see line 266 in\nsco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which\ntries to get hcon->hdev, resulting in dereferencing a NULL pointer as\nreported by syzkaller.\n\nThe same issue exists for iso_connect_cis() calling hci_connect_cis().\n\nThus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR\ninstead of NULL."
    }
  ],
  "lastModified": "2026-06-17T06:46:41.563",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}