CVE-2026-53400 (GCVE-0-2026-53400)

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-08-05 12:35
VLAI
Title
i2c: core: fix adapter registration race
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < 2e57c788e71f1763445f812eba4e0b4a2fbd0646 (git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < a4365bc41baaf67f3a5aa8556d23544e6ec7480a (git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < 1febb174815bcae56d73587e99e8f87e02f0784d (git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < da9d8d9711f78deebc202d0cffcf577e45ee8621 (git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < 78793c75dc6d0ff2e4d50ad617349b328a99054e (git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < 6a946038f2a5a8c29048c6af369d4e391448a5c5 (git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0 (git)
Affected: 6e13e641841833cc2aa5baefe89bb04bc388801b , < ba14d7cf2fe7284610a29854bdff22b2537d3ce6 (git)
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Linux Linux Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.95 , ≤ 6.12.* (semver)
Unaffected: 6.18.38 , ≤ 6.18.* (semver)
Unaffected: 7.1.3 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-20T15:43:52+00:00",
      "cve": "CVE-2026-53400",
      "id": "CVE-2026-53400",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: i2c: core: fix adapter registration race",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53400.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-07T23:48:46Z",
      "cve": "CVE-2026-53400",
      "id": "CVE-2026-53400",
      "initial_release_date": "2026-07-19T17:35:56Z",
      "product_status:known_affected": "188",
      "product_status:known_not_affected": "96",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53400",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53400.json",
      "version": "5"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.