CVE-2026-97484 (GCVE-0-2026-97484)
Vulnerability from cvelistv5
Published
2026-09-24 16:04
Modified
2026-10-03 10:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usbip: vhci_hcd: fix NULL deref in status_show_vhci platform_get_drvdata() can return NULL if a VHCI host controller's probe failed (e.g. due to USB bus number exhaustion). status_show_vhci() checked for a NULL pdev but not for a NULL hcd returned by platform_get_drvdata(). Passing NULL to hcd_to_vhci_hcd() does not return NULL - it returns a pointer offset of 0x260, causing a NULL pointer dereference when that value is subsequently dereferenced. Add a NULL check on hcd before calling hcd_to_vhci_hcd(). Move status_show_not_ready() above status_show_vhci() to make it callable from the new error path without a forward declaration.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0775a9cbc694e8c7276688be3bbd2f386167ab54
Version: 0775a9cbc694e8c7276688be3bbd2f386167ab54
Version: 0775a9cbc694e8c7276688be3bbd2f386167ab54
Version: 0775a9cbc694e8c7276688be3bbd2f386167ab54
Version: 0775a9cbc694e8c7276688be3bbd2f386167ab54
Version: 0775a9cbc694e8c7276688be3bbd2f386167ab54
Version: 0775a9cbc694e8c7276688be3bbd2f386167ab54
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/usbip/vhci_sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/usbip/vhci_sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.271",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
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                  "vulnerable": true
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbip: vhci_hcd: fix NULL deref in status_show_vhci\n\nplatform_get_drvdata() can return NULL if a VHCI host controller\u0027s\nprobe failed (e.g. due to USB bus number exhaustion). status_show_vhci()\nchecked for a NULL pdev but not for a NULL hcd returned by\nplatform_get_drvdata(). Passing NULL to hcd_to_vhci_hcd() does not\nreturn NULL - it returns a pointer offset of 0x260, causing a NULL\npointer dereference when that value is subsequently dereferenced.\n\nAdd a NULL check on hcd before calling hcd_to_vhci_hcd(). Move\nstatus_show_not_ready() above status_show_vhci() to make it callable\nfrom the new error path without a forward declaration."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:48.553Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2b477ee5cc9c2670185ffd82911a20e1760008c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/671d2687a790f63110c3c4213230209f5c3e0e8e"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd7d938ab4759a45eb107e658c199a2c47cc1ace"
        },
        {
          "url": "https://git.kernel.org/stable/c/517c353e5358b2123cbf620a1798fe632fb7bdce"
        },
        {
          "url": "https://git.kernel.org/stable/c/046a94fdb02eb1df86c8fa4614104ff801ba3ab7"
        },
        {
          "url": "https://git.kernel.org/stable/c/dacd7c317ba12e035653c28a0eaaf23d91abc073"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc150783542ba2e7c1257d1299c6f3269bdba270"
        }
      ],
      "title": "usbip: vhci_hcd: fix NULL deref in status_show_vhci",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97484",
    "datePublished": "2026-09-24T16:04:27.978Z",
    "dateReserved": "2026-09-24T16:01:01.149Z",
    "dateUpdated": "2026-10-03T10:58:48.553Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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