CVE-2023-53219

Estado: ModificadaAlta (7.8)—

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

media: netup_unidvb: fix use-after-free at del_timer()

When Universal DVB card is detaching, netup_unidvb_dma_fini() uses del_timer() to stop dma->timeout timer. But when timer handler netup_unidvb_dma_timeout() is running, del_timer() could not stop it. As a result, the use-after-free bug could happen. The process is shown below:

Fix by changing del_timer() to del_timer_sync().

Detalles técnicos trazas, registros y código del informe original

    (cleanup routine)          |        (timer routine)
                               | mod_timer(&dev->tx_sim_timer, ..)
netup_unidvb_finidev()         | (wait a time)
  netup_unidvb_dma_fini()      | netup_unidvb_dma_timeout()
    del_timer(&dma->timeout);  |
                               |   ndev->pci_dev->dev //USE

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.16%
Percentil entre todas las CVEs puntuadas: 5
Fecha de la puntuación: 6/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution70 %

Vulnerabilidad use-after-free en kernel Linux (CWE-416) accesible con privilegios locales (PR:L), permite escalada mediante corrupción de memoria o ejecución de código arbitrario en contexto de kernel.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416
CWE-416

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-53219",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-53219",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-14T17:49:56.699110Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "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": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "dd5c77814f290b353917df329f36de1472d47154",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "90229e9ee957d4514425e4a4d82c50ab5d57ac4d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "1550bcf2983ae1220cc8ab899a39a423fa7cb523",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "f9982db735a8495eee14267cf193c806b957e942",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "07821524f67bf920342bc84ae8b3dea2a315a89e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e",
              "lessThan": "0f5bb36bf9b39a2a96e730bf4455095b50713f63",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/media/pci/netup_unidvb/netup_unidvb_core.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.3"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.3",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.14.316",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "status": "unaffected",
              "version": "4.19.284",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.244",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.181",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.113",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.30",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.3.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/media/pci/netup_unidvb/netup_unidvb_core.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-09-15T15:15:48.623",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: netup_unidvb: fix use-after-free at del_timer()\n\nWhen Universal DVB card is detaching, netup_unidvb_dma_fini()\nuses del_timer() to stop dma->timeout timer. But when timer\nhandler netup_unidvb_dma_timeout() is running, del_timer()\ncould not stop it. As a result, the use-after-free bug could\nhappen. The process is shown below:\n\n    (cleanup routine)          |        (timer routine)\n                               | mod_timer(&dev->tx_sim_timer, ..)\nnetup_unidvb_finidev()         | (wait a time)\n  netup_unidvb_dma_fini()      | netup_unidvb_dma_timeout()\n    del_timer(&dma->timeout);  |\n                               |   ndev->pci_dev->dev //USE\n\nFix by changing del_timer() to del_timer_sync()."
    }
  ],
  "lastModified": "2026-06-17T06:44:32.430",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5DD8B268-93E3-48C7-9D9D-154DC7437395",
              "versionEndExcluding": "4.14.316",
              "versionStartIncluding": "4.3"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9112EE64-11F4-46DB-A041-95118F20F81B",
              "versionEndExcluding": "4.19.284",
              "versionStartIncluding": "4.15"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "79F47095-8BA3-495A-AED3-2CCA5F2838E6",
              "versionEndExcluding": "5.4.244",
              "versionStartIncluding": "4.20"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F5B1726B-45AA-47F2-9261-6DC963E92248",
              "versionEndExcluding": "5.10.181",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F3D5E1B5-AB9D-4ECC-8F11-F3E1BF761E27",
              "versionEndExcluding": "5.15.113",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E9430E62-03EA-42E6-9E5E-BD1D5124D107",
              "versionEndExcluding": "6.1.30",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "26C54BF0-3EED-46D4-92A7-5F07F658B49B",
              "versionEndExcluding": "6.3.4",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "38BC6744-7D25-4C02-9966-B224CD071D30"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "76061B41-CAE9-4467-BEDE-0FFC7956F2A1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}