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usb: gadget: fix null pointer dereference in usb_put_function_instance()

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-90019

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-90019

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "0fc54a00954f9f4c3e3d4ffa64a530685d99a39b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "6e6736c049683380f5e20becde498986e9293ca4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "3a9691fff79bcce95338435599df6d3ae433cfdc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "7a4f4ca7ff32ae24807c83e2a06d62b13378d53c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "d3a7fa61997db3bf6dadef4c1bd87a4fa782a817",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "5117f236e9e30744338b425395d55913c4500897",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2",
        "lessThan": "6e74ac5c596fd246e37eadfc354567179ccbe9aa",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/usb/gadget/functions.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/usb/gadget/functions.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90019

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36451 · Revision 1
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Publisher date
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