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CVE-2019-25162 (GCVE-0-2019-25162)

Vulnerability from cvelistv5 – Published: 2024-02-26 17:20 – Updated: 2026-08-05 08:43
VLAI
Title
i2c: Fix a potential use after free
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: Fix a potential use after free Free the adap structure only after we are done using it. This patch just moves the put_device() down a bit to avoid the use after free. [wsa: added comment to the code, added Fixes tag]
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-19 18:51 UTC
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < e6412ba3b6508bdf9c074d310bf4144afa6aec1a (git)
Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < 23a191b132cd87f746c62f3dc27da33683d85829 (git)
Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < 871a1e94929a27bf6e2cd99523865c840bbc2d87 (git)
Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < 81cb31756888bb062e92d2dca21cd629d77a46a9 (git)
Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < 35927d7509ab9bf41896b7e44f639504eae08af7 (git)
Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < e8e1a046cf87c8b1363e5de835114f2779e2aaf4 (git)
Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < 12b0606000d0828630c033bf0c74c748464fe87d (git)
Affected: 611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6 , < e4c72c06c367758a14f227c847f9d623f1994ecf (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.3
Unaffected: 0 , < 4.3 (semver)
Unaffected: 4.14.291 , ≤ 4.14.* (semver)
Unaffected: 4.19.256 , ≤ 4.19.* (semver)
Unaffected: 5.4.211 , ≤ 5.4.* (semver)
Unaffected: 5.10.137 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

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                  "version": "611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6",
                  "versionType": "git"
                },
                {
                  "lessThan": "12b0606000d0828630c033bf0c74c748464fe87d",
                  "status": "affected",
                  "version": "611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6",
                  "versionType": "git"
                },
                {
                  "lessThan": "e4c72c06c367758a14f227c847f9d623f1994ecf",
                  "status": "affected",
                  "version": "611e12ea0f121a31d9e9c4ce2a18a77abc2f28d6",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/i2c/i2c-core-base.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.3"
                },
                {
                  "lessThan": "4.3",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.14.*",
                  "status": "unaffected",
                  "version": "4.14.291",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.256",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.211",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.137",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.61",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.18.*",
                  "status": "unaffected",
                  "version": "5.18.18",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.19.*",
                  "status": "unaffected",
                  "version": "5.19.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.0",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.14.291",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.256",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.211",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.137",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.61",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18.18",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.19.2",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.0",
                      "versionStartIncluding": "4.3",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: Fix a potential use after free\n\nFree the adap structure only after we are done using it.\nThis patch just moves the put_device() down a bit to avoid the\nuse after free.\n\n[wsa: added comment to the code, added Fixes tag]"
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The vulnerable i2c_put_adapter path is reached locally via i2c-dev (/dev/i2c-* open/release) or other in-kernel get/put holders; it is not reachable from the network stack or unauthenticated remote protocols.\nAC:L - An attacker who can open the i2c device and induce adapter teardown (e.g., USB-I2C hot-unplug on a kiosk/shared system, or concurrent close while deletion awaits the final ref) controls both sides of the race, so success does not depend on unpredictable victim state.\nPR:L - Exploitation requires access to /dev/i2c-*, which in the most severe realistic deployments (embedded, Raspberry Pi, industrial/Android HALs) is granted to an unprivileged i2c-group user rather than full root; no init-namespace admin capability is required for the open/close side.\nUI:N - No separate victim action is required; the attacker performs the open/close and can trigger or participate in adapter removal themselves.\nS:U - This is a standard kernel memory-corruption/privilege-escalation issue within the host kernel\u0027s security authority; it does not cross VM, IOMMU, or other security boundaries.\nC:H - Use-after-free of the i2c_adapter object enables heap reuse and attacker-controlled object contents, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same UAF primitive supports heap spraying and corruption of reused kernel objects, enabling arbitrary write and control-flow hijacking / code execution in kernel context.\nA:H - Dereferencing the freed adapter (and subsequent corrupted state) can cause kernel oops/panic or otherwise crash the system, fully impacting availability."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:43:46.382Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/e6412ba3b6508bdf9c074d310bf4144afa6aec1a"
            },
            {
              "url": "https://git.kernel.org/stable/c/23a191b132cd87f746c62f3dc27da33683d85829"
            },
            {
              "url": "https://git.kernel.org/stable/c/871a1e94929a27bf6e2cd99523865c840bbc2d87"
            },
            {
              "url": "https://git.kernel.org/stable/c/81cb31756888bb062e92d2dca21cd629d77a46a9"
            },
            {
              "url": "https://git.kernel.org/stable/c/35927d7509ab9bf41896b7e44f639504eae08af7"
            },
            {
              "url": "https://git.kernel.org/stable/c/e8e1a046cf87c8b1363e5de835114f2779e2aaf4"
            },
            {
              "url": "https://git.kernel.org/stable/c/12b0606000d0828630c033bf0c74c748464fe87d"
            },
            {
              "url": "https://git.kernel.org/stable/c/e4c72c06c367758a14f227c847f9d623f1994ecf"
            }
          ],
          "title": "i2c: Fix a potential use after free",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2019-25162",
        "datePublished": "2024-02-26T17:20:20.846Z",
        "dateReserved": "2024-02-26T17:07:20.465Z",
        "dateUpdated": "2026-08-05T08:43:46.382Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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