CVE-2026-98772 (GCVE-0-2026-98772)
Vulnerability from cvelistv5
Published
2026-10-18 15:48
Modified
2026-10-21 12:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: serial: fix port tear down use-after-free Some drivers for multiport devices access port driver data from completion handlers of shared URBs submitted at attach() or first open() and stopped at disconnect() or last close(), respectively. A simple NULL check before accessing the driver data makes sure that a port state container has at least been allocated, but a completion handler can still race with port tear down. Reorder the disconnect handling so that ports are not deregistered (and their driver data freed) until after all ports have been hung up and the driver disconnect() callback has run so that all I/O has been stopped.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2d93148ab6988cad872e65d694c95e8944e1b626
Version: 2d93148ab6988cad872e65d694c95e8944e1b626
Version: 2d93148ab6988cad872e65d694c95e8944e1b626
Version: 2d93148ab6988cad872e65d694c95e8944e1b626
Version: 2d93148ab6988cad872e65d694c95e8944e1b626
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/usb-serial.c"
          ],
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.30"
            },
            {
              "lessThan": "2.6.30",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.18.56",
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              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: fix port tear down use-after-free\n\nSome drivers for multiport devices access port driver data from\ncompletion handlers of shared URBs submitted at attach() or first open()\nand stopped at disconnect() or last close(), respectively.\n\nA simple NULL check before accessing the driver data makes sure that a\nport state container has at least been allocated, but a completion\nhandler can still race with port tear down.\n\nReorder the disconnect handling so that ports are not deregistered (and\ntheir driver data freed) until after all ports have been hung up and the\ndriver disconnect() callback has run so that all I/O has been stopped."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:56:47.424Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e4a6883ad9b4686a5f4bd90ff55a44d7ab65bd3c"
        },
        {
          "url": "https://git.kernel.org/stable/c/60cc9379c3e650d1ebfba4de63f1242537a62a32"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e8980a81af195c49084be5b4c031085b56c7443"
        },
        {
          "url": "https://git.kernel.org/stable/c/e80ee74206f260eb1282e7d1339ff146a4a410d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/33c920f7c5952dfc42d1b8ea6efe16b1f0bb0c5b"
        }
      ],
      "title": "USB: serial: fix port tear down use-after-free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98772",
    "datePublished": "2026-10-18T15:48:08.184Z",
    "dateReserved": "2026-09-25T10:25:14.369Z",
    "dateUpdated": "2026-10-21T12:56:47.424Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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