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CVE-2022-50745

Estado: AplazadaAlta (7.8)—

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

staging: media: tegra-video: fix device_node use after free

At probe time this code path is followed:

After that, chan->of_node keeps storing the node until the device is removed.

of_node_get() the node and of_node_put() it during teardown to avoid any risk.

Detalles técnicos trazas, registros y código del informe original
 * tegra_csi_init
   * tegra_csi_channels_alloc
     * for_each_child_of_node(node, channel) -- iterates over channels
       * automatically gets 'channel'
         * tegra_csi_channel_alloc()
           * saves into chan->of_node a pointer to the channel OF node
       * automatically gets and puts 'channel'
       * now the node saved in chan->of_node has refcount 0, can disappear
   * tegra_csi_channels_init
     * iterates over channels
       * tegra_csi_channel_init -- uses chan->of_node

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).

🎯 Técnicas ATT&CK

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

Vulnerabilidad de use-after-free en kernel Linux con acceso local y privilegios limitados (PR:L) permite denegación de servicio por corrupción de memoria; potencial escalada de privilegios (HIGH impact).

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

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

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)

Mostrar
{
  "id": "CVE-2022-50745",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "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": "1ebaeb09830f36c1111b72a95420814225bd761c",
              "lessThan": "5451efb2ca30f3c42b9efb8327ce35b62870dbd3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1ebaeb09830f36c1111b72a95420814225bd761c",
              "lessThan": "ce50c612458091d926ccb05d7db11d9f93532db2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1ebaeb09830f36c1111b72a95420814225bd761c",
              "lessThan": "6512c9498fcb97e7c760e3ef86b2272f2c0f765f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1ebaeb09830f36c1111b72a95420814225bd761c",
              "lessThan": "0fd003d3c708c80350a815eaf37b8e1114b976cf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1ebaeb09830f36c1111b72a95420814225bd761c",
              "lessThan": "c4d344163c3a7f90712525f931a6c016bbb35e18",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/staging/media/tegra-video/csi.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.87",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.0.18",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/staging/media/tegra-video/csi.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T13:16:01.210",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0fd003d3c708c80350a815eaf37b8e1114b976cf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5451efb2ca30f3c42b9efb8327ce35b62870dbd3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6512c9498fcb97e7c760e3ef86b2272f2c0f765f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c4d344163c3a7f90712525f931a6c016bbb35e18",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ce50c612458091d926ccb05d7db11d9f93532db2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: media: tegra-video: fix device_node use after free\n\nAt probe time this code path is followed:\n\n * tegra_csi_init\n   * tegra_csi_channels_alloc\n     * for_each_child_of_node(node, channel) -- iterates over channels\n       * automatically gets 'channel'\n         * tegra_csi_channel_alloc()\n           * saves into chan->of_node a pointer to the channel OF node\n       * automatically gets and puts 'channel'\n       * now the node saved in chan->of_node has refcount 0, can disappear\n   * tegra_csi_channels_init\n     * iterates over channels\n       * tegra_csi_channel_init -- uses chan->of_node\n\nAfter that, chan->of_node keeps storing the node until the device is\nremoved.\n\nof_node_get() the node and of_node_put() it during teardown to avoid any\nrisk."
    }
  ],
  "lastModified": "2026-08-04T10:18:22.743",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}