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usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: fix deadlock in usbg_make_tpg() usbg_make_tpg() held dep_lock while calling configfs_depend_item_unlocked(), which acquires the configfs root inode lock when operating across subsystems. This creates a circular lock dependency with configfs_rmdir(): dep_lock -> configfs root inode lock -> su_mutex -> dep_lock In usbg_make_tpg(), dep_lock only serialized the read of opts->ready, which is a monotonic flag that transitions from false to true exactly once (in tcm_set_name()) and never reverts. Remove dep_lock from usbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access opts->ready locklessly instead.

Announced Source revision 1
Original source ↗

CVE-2026-93214

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-2026-93214

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": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "3639438a4c83ffc2e564c8c010b92137c5d11cfa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "78a14ea2284825055ab6c2a1f3489510f560f3a2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "eef3e62f90d86c1c5651742f84ecc9db1814a893",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "f81a2da137b029a282b9bc64d2f267d242948659",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "d90b0f90e30cd59b36005a4016b15cf02bcd7fb2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4bb8548df632187d5db50878e71804af5f7c51ad",
        "lessThan": "9dbf74f4022f80f7669d2b3c22c5deb46c1b5674",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/usb/gadget/function/f_tcm.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.5",
        "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": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/usb/gadget/function/f_tcm.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-93214

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#37917 · Revision 1
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Publisher date
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