CVE-2026-90019 (GCVE-0-2026-90019)
Vulnerability from cvelistv5
Published
2026-09-16 10:33
Modified
2026-10-19 08:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fix null pointer dereference in usb_put_function_instance() usb_put_function_instance() attempts to dereference fd inside fi struct to get mod in uvc_alloc_inst() error path. However, fd is not allocated until later in try_get_usb_function_instance() after allocating fi in uvc_alloc_inst() and thus guranteed to be null in error path. Fix this by adding a null check for fi->fd that returns if fd is null.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
Version: 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/functions.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.9"
            },
            {
              "lessThan": "3.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
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            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
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              "version": "6.18.51",
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              "version": "7.2.5",
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: fix null pointer dereference in usb_put_function_instance()\n\nusb_put_function_instance() attempts to dereference fd inside fi struct\nto get mod in uvc_alloc_inst() error path. However, fd is not allocated\nuntil later in try_get_usb_function_instance() after allocating fi in\nuvc_alloc_inst() and thus guranteed to be null in error path. Fix this\nby adding a null check for fi-\u003efd that returns if fd is null."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:56:32.862Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0fc54a00954f9f4c3e3d4ffa64a530685d99a39b"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e6736c049683380f5e20becde498986e9293ca4"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a9691fff79bcce95338435599df6d3ae433cfdc"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a4f4ca7ff32ae24807c83e2a06d62b13378d53c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3a7fa61997db3bf6dadef4c1bd87a4fa782a817"
        },
        {
          "url": "https://git.kernel.org/stable/c/5117f236e9e30744338b425395d55913c4500897"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e74ac5c596fd246e37eadfc354567179ccbe9aa"
        }
      ],
      "title": "usb: gadget: fix null pointer dereference in usb_put_function_instance()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90019",
    "datePublished": "2026-09-16T10:33:24.173Z",
    "dateReserved": "2026-09-11T19:38:34.781Z",
    "dateUpdated": "2026-10-19T08:56:32.862Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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