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CVE-2026-68214

Estado: RecibidaSin puntuar—

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

media: rtl2832: fix use-after-free in rtl2832_remove()

cancel_delayed_work_sync() is called before i2c_mux_del_adapters() in rtl2832_remove(). While the cancel waits for any running instance of i2c_gate_work to finish, it does not prevent the timer from being rescheduled by a concurrent thread.

During probe, the r820t_attach() call attempts I2C transfers through the mux adapter. These transfers go through i2c_mux_master_xfer(), which calls rtl2832_deselect() after the transfer completes, rescheduling i2c_gate_work via schedule_delayed_work(). If this transfer is still in flight when rtl2832_remove() runs, rtl2832_deselect() can reschedule i2c_gate_work after it has been cancelled, causing a use-after-free when kfree(dev) is called.

Leer descripción completaMostrar menos

Fix this by calling i2c_mux_del_adapters() before cancel_delayed_work_sync(). Once the mux adapter is unregistered, no new I2C transfers can go through it, so rtl2832_deselect() can no longer reschedule i2c_gate_work. The subsequent cancel_delayed_work_sync() is then guaranteed to be final.

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-2026-68214",
  "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": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "1e8a6bc19403661661fed5ae82f6eca6c9cdfad2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "68a9c0290897c1436ddceb8cea604c93377a0299",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "13c06056699e66ff7109ba68658cc6ea4a23f516",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "9acd5bbbe1df8e487e49488692c224496d4c9e16",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "24bef237eef8dd1ebcffb129ba21891ddad0d309",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "2c71bda6edc630a1f8c3c45d8df5fc22d234e042",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "90d781711418881f8c836c2a859cc2886625d750",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cddcc40b1b1553010acb89add84c64b5d123ec94",
              "lessThan": "680daf40a82d483949f87f0d8f98639dc47e610c",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/media/dvb-frontends/rtl2832.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/media/dvb-frontends/rtl2832.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:09.287",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/13c06056699e66ff7109ba68658cc6ea4a23f516",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1e8a6bc19403661661fed5ae82f6eca6c9cdfad2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/24bef237eef8dd1ebcffb129ba21891ddad0d309",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2c71bda6edc630a1f8c3c45d8df5fc22d234e042",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/680daf40a82d483949f87f0d8f98639dc47e610c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/68a9c0290897c1436ddceb8cea604c93377a0299",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/90d781711418881f8c836c2a859cc2886625d750",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9acd5bbbe1df8e487e49488692c224496d4c9e16",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rtl2832: fix use-after-free in rtl2832_remove()\n\ncancel_delayed_work_sync() is called before i2c_mux_del_adapters()\nin rtl2832_remove(). While the cancel waits for any running instance\nof i2c_gate_work to finish, it does not prevent the timer from being\nrescheduled by a concurrent thread.\n\nDuring probe, the r820t_attach() call attempts I2C transfers through\nthe mux adapter. These transfers go through i2c_mux_master_xfer(),\nwhich calls rtl2832_deselect() after the transfer completes,\nrescheduling i2c_gate_work via schedule_delayed_work(). If this\ntransfer is still in flight when rtl2832_remove() runs,\nrtl2832_deselect() can reschedule i2c_gate_work after it has been\ncancelled, causing a use-after-free when kfree(dev) is called.\n\nFix this by calling i2c_mux_del_adapters() before\ncancel_delayed_work_sync(). Once the mux adapter is unregistered, no\nnew I2C transfers can go through it, so rtl2832_deselect() can no\nlonger reschedule i2c_gate_work. The subsequent\ncancel_delayed_work_sync() is then guaranteed to be final."
    }
  ],
  "lastModified": "2026-08-19T17:20:37.390",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}