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i2c: core: fix adapter registration race

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter registration race Adapters can be looked up based on their id using i2c_get_adapter() which takes a reference to the embedded struct device. Make sure that the adapter (including its struct device) has been initialised before adding it to the IDR to avoid accessing uninitialised data which could, for example, lead to NULL-pointer dereferences or use-after-free. Note that the i2c-dev chardev, which is registered from a bus notifier, currently uses i2c_get_adapter() so the adapter needs to be added to the IDR before registration.

Announced Source revision 1
Original source ↗

CVE-2026-53400

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-2026-53400

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": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "2e57c788e71f1763445f812eba4e0b4a2fbd0646",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "a4365bc41baaf67f3a5aa8556d23544e6ec7480a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "1febb174815bcae56d73587e99e8f87e02f0784d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "da9d8d9711f78deebc202d0cffcf577e45ee8621",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "78793c75dc6d0ff2e4d50ad617349b328a99054e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "6a946038f2a5a8c29048c6af369d4e391448a5c5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
        "lessThan": "ba14d7cf2fe7284610a29854bdff22b2537d3ce6",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/i2c/i2c-core-base.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.22"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.22",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.95",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.38",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.3",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/i2c/i2c-core-base.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-53400

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40826 · Revision 1
Added to Heist Feed
Publisher date
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