FKIE_CVE-2026-53384

Vulnerability from fkie_nvd - Published: 2026-07-19 12:16 - Updated: 2026-07-20 15:16
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_unregister_port() lives in dw8250_remove(), which is not called when probe fails, so the port slot stays occupied until the device is rebound or the system is rebooted. The devm-allocated driver data is freed while the port still references it (via the saved private_data and serial_in/serial_out callbacks), so any access to that port slot before a rebind is a use-after-free hazard. Unregister the port on the clk_notifier_register() error path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07ffe414a708ae60551401cec5d727ed156b8caf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/10fc708b4de7f86002d2d735a2dbf3b5b7f65692
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d205fe80f2181f0109150ad1fa06ee5bc046935
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/511d2b92f8d20de04acafab676150d26fb5c67f4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/778b9dda4b24005a27bcd9c35c110bf8d7f259ca
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ccdf4510a3873b14e5e348cdb038717996f09fda
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d72650a4f334581b23a1892b888a4cb1be142f76
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/8250/8250_dw.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ccdf4510a3873b14e5e348cdb038717996f09fda",
              "status": "affected",
              "version": "cc816969d7b5973d2720d9afd381f06f0eac6885",
              "versionType": "git"
            },
            {
              "lessThan": "511d2b92f8d20de04acafab676150d26fb5c67f4",
              "status": "affected",
              "version": "cc816969d7b5973d2720d9afd381f06f0eac6885",
              "versionType": "git"
            },
            {
              "lessThan": "07ffe414a708ae60551401cec5d727ed156b8caf",
              "status": "affected",
              "version": "cc816969d7b5973d2720d9afd381f06f0eac6885",
              "versionType": "git"
            },
            {
              "lessThan": "3d205fe80f2181f0109150ad1fa06ee5bc046935",
              "status": "affected",
              "version": "cc816969d7b5973d2720d9afd381f06f0eac6885",
              "versionType": "git"
            },
            {
              "lessThan": "d72650a4f334581b23a1892b888a4cb1be142f76",
              "status": "affected",
              "version": "cc816969d7b5973d2720d9afd381f06f0eac6885",
              "versionType": "git"
            },
            {
              "lessThan": "778b9dda4b24005a27bcd9c35c110bf8d7f259ca",
              "status": "affected",
              "version": "cc816969d7b5973d2720d9afd381f06f0eac6885",
              "versionType": "git"
            },
            {
              "lessThan": "10fc708b4de7f86002d2d735a2dbf3b5b7f65692",
              "status": "affected",
              "version": "cc816969d7b5973d2720d9afd381f06f0eac6885",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/8250/8250_dw.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "lessThan": "5.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250_dw: unregister 8250 port if clk_notifier_register() fails\n\ndw8250_probe() registers the 8250 port via serial8250_register_8250_port()\nand then, if the device has a clock, registers a clock notifier. If\nclk_notifier_register() fails, probe returns the error but leaves the\n8250 port registered. The matching serial8250_unregister_port() lives\nin dw8250_remove(), which is not called when probe fails, so the port\nslot stays occupied until the device is rebound or the system is\nrebooted. The devm-allocated driver data is freed while the port still\nreferences it (via the saved private_data and serial_in/serial_out\ncallbacks), so any access to that port slot before a rebind is a\nuse-after-free hazard.\n\nUnregister the port on the clk_notifier_register() error path."
    }
  ],
  "id": "CVE-2026-53384",
  "lastModified": "2026-07-20T15:16:40.943",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-19T12:16:49.263",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/07ffe414a708ae60551401cec5d727ed156b8caf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/10fc708b4de7f86002d2d735a2dbf3b5b7f65692"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d205fe80f2181f0109150ad1fa06ee5bc046935"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/511d2b92f8d20de04acafab676150d26fb5c67f4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/778b9dda4b24005a27bcd9c35c110bf8d7f259ca"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ccdf4510a3873b14e5e348cdb038717996f09fda"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d72650a4f334581b23a1892b888a4cb1be142f76"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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