« Volver al listado

CVE-2025-21689

Estado: ModificadaMedia (5.5)—

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

USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()

This patch addresses a null-ptr-deref in qt2_process_read_urb() due to an incorrect bounds check in the following:

The condition doesn't account for the valid range of the serial->port buffer, which is from 0 to serial->num_ports - 1. When newport is equal to serial->num_ports, the assignment of "port" in the following code is out-of-bounds and NULL:

The fix checks if newport is greater than or equal to serial->num_ports indicating it is out-of-bounds.

Detalles técnicos trazas, registros y código del informe original
       if (newport > serial->num_ports) {
               dev_err(&port->dev,
                       "%s - port change to invalid port: %i\n",
                       __func__, newport);
               break;
       }

       serial_priv->current_port = newport;
       port = serial->port[serial_priv->current_port];

CVSS

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)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-21689",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-21689",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-10-01T19:51:31.131902Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "fa4c7472469d97c4707698b4c0e098f8cfc2bf22",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "94770cf7c5124f0268d481886829dc2beecc4507",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "4b9b41fabcd38990f69ef0cee9c631d954a2b530",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "6377838560c03b36e1153a42ef727533def9b68f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "f371471708c7d997f763b0e70565026eb67cc470",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "8542b33622571f54dfc2a267fce378b6e3840b8b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f7a33e608d9ae022b7f49307921627e34e9484ed",
              "lessThan": "575a5adf48b06a2980c9eeffedf699ed5534fade",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/usb/serial/quatech2.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.4.290",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.234",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.178",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.128",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.75",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.12",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13.1",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/usb/serial/quatech2.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-10T16:15:38.447",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()\n\nThis patch addresses a null-ptr-deref in qt2_process_read_urb() due to\nan incorrect bounds check in the following:\n\n       if (newport > serial->num_ports) {\n               dev_err(&port->dev,\n                       \"%s - port change to invalid port: %i\\n\",\n                       __func__, newport);\n               break;\n       }\n\nThe condition doesn't account for the valid range of the serial->port\nbuffer, which is from 0 to serial->num_ports - 1. When newport is equal\nto serial->num_ports, the assignment of \"port\" in the\nfollowing code is out-of-bounds and NULL:\n\n       serial_priv->current_port = newport;\n       port = serial->port[serial_priv->current_port];\n\nThe fix checks if newport is greater than or equal to serial->num_ports\nindicating it is out-of-bounds."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: serial: quatech2: arreglo de null-ptr-deref en qt2_process_read_urb() Este parche soluciona un null-ptr-deref en qt2_process_read_urb() debido a una comprobación de los límites incorrecta en lo siguiente: if (newport > serial->num_ports) { dev_err(&port->dev, \"%s - port change to invalid port: %i\\n\", __func__, newport); break; } La condición no tiene en cuenta el rango válido del búfer serial->port, que es de 0 a serial->num_ports - 1. Cuando newport es igual a serial->num_ports, la asignación de \"port\" en el siguiente código está fuera de los límites y es NULL: serial_priv->current_port = newport; port = serial->port[serial_priv->current_port]; La solución verifica si newport es mayor o igual que serial->num_ports, lo que indica que está fuera de los límites."
    }
  ],
  "lastModified": "2026-06-17T08:44:01.713",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C332DF00-BEC8-45B0-8795-4706DA6CBD65",
              "versionEndExcluding": "5.4.290",
              "versionStartIncluding": "3.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F732162B-ED7E-4367-A5C2-B24FD9B0D33B",
              "versionEndExcluding": "5.10.234",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "171159A1-9827-4C7B-821D-55398B837C49",
              "versionEndExcluding": "5.15.178",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EDB5047C-0330-407A-BE1B-513B5BF304DE",
              "versionEndExcluding": "6.1.128",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E8D39B53-7390-48BE-92FD-8846BE8E8430",
              "versionEndExcluding": "6.6.75",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B04C243A-753B-49A9-87C7-92FCC1425FB7",
              "versionEndExcluding": "6.12.12",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5A3F9505-6B98-4269-8B81-127E55A1BF00"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DE491969-75AE-4A6B-9A58-8FC5AF98798F"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "93C0660D-7FB8-4FBA-892A-B064BA71E49E"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "034C36A6-C481-41F3-AE9A-D116E5BE6895"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8AF9DC49-2085-4FFB-A7E3-73DFAFECC7F2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5DFCDFB8-4FD0-465A-9076-D813D78FE51B"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}