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CVE-2022-49749 (GCVE-0-2022-49749)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:42 – Updated: 2026-05-11 19:06
VLAI
Title
i2c: designware: use casting of u64 in clock multiplication to avoid overflow
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: designware: use casting of u64 in clock multiplication to avoid overflow In functions i2c_dw_scl_lcnt() and i2c_dw_scl_hcnt() may have overflow by depending on the values of the given parameters including the ic_clk. For example in our use case where ic_clk is larger than one million, multiplication of ic_clk * 4700 will result in 32 bit overflow. Add cast of u64 to the calculation to avoid multiplication overflow, and use the corresponding define for divide.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 17:23 UTC
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2373f6b9744d5373b886f3ce1a985193cca0a356 , < ed173f77fd28a3e4fffc13b3f28687b9eba61157 (git)
Affected: 2373f6b9744d5373b886f3ce1a985193cca0a356 , < 2f29d780bd691d20e89e5b35d5e6568607115e94 (git)
Affected: 2373f6b9744d5373b886f3ce1a985193cca0a356 , < 9f36aae9e80e79b7a6d62227eaa96935166be9fe (git)
Affected: 2373f6b9744d5373b886f3ce1a985193cca0a356 , < c8c37bc514514999e62a17e95160ed9ebf75ca8d (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 5.10.166 , ≤ 5.10.* (semver)
Unaffected: 5.15.91 , ≤ 5.15.* (semver)
Unaffected: 6.1.9 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                "drivers/i2c/busses/i2c-designware-common.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "ed173f77fd28a3e4fffc13b3f28687b9eba61157",
                  "status": "affected",
                  "version": "2373f6b9744d5373b886f3ce1a985193cca0a356",
                  "versionType": "git"
                },
                {
                  "lessThan": "2f29d780bd691d20e89e5b35d5e6568607115e94",
                  "status": "affected",
                  "version": "2373f6b9744d5373b886f3ce1a985193cca0a356",
                  "versionType": "git"
                },
                {
                  "lessThan": "9f36aae9e80e79b7a6d62227eaa96935166be9fe",
                  "status": "affected",
                  "version": "2373f6b9744d5373b886f3ce1a985193cca0a356",
                  "versionType": "git"
                },
                {
                  "lessThan": "c8c37bc514514999e62a17e95160ed9ebf75ca8d",
                  "status": "affected",
                  "version": "2373f6b9744d5373b886f3ce1a985193cca0a356",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/i2c/busses/i2c-designware-common.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.2"
                },
                {
                  "lessThan": "3.2",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.166",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.91",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.9",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.2",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.166",
                      "versionStartIncluding": "3.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.91",
                      "versionStartIncluding": "3.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.9",
                      "versionStartIncluding": "3.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.2",
                      "versionStartIncluding": "3.2",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: designware: use casting of u64 in clock multiplication to avoid overflow\n\nIn functions i2c_dw_scl_lcnt() and i2c_dw_scl_hcnt() may have overflow\nby depending on the values of the given parameters including the ic_clk.\nFor example in our use case where ic_clk is larger than one million,\nmultiplication of ic_clk * 4700 will result in 32 bit overflow.\n\nAdd cast of u64 to the calculation to avoid multiplication overflow, and\nuse the corresponding define for divide."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T08:44:33.757Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ed173f77fd28a3e4fffc13b3f28687b9eba61157"
            },
            {
              "url": "https://git.kernel.org/stable/c/2f29d780bd691d20e89e5b35d5e6568607115e94"
            },
            {
              "url": "https://git.kernel.org/stable/c/9f36aae9e80e79b7a6d62227eaa96935166be9fe"
            },
            {
              "url": "https://git.kernel.org/stable/c/c8c37bc514514999e62a17e95160ed9ebf75ca8d"
            }
          ],
          "title": "i2c: designware: use casting of u64 in clock multiplication to avoid overflow",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49749",
        "datePublished": "2025-03-27T16:42:58.426Z",
        "dateReserved": "2025-03-27T16:39:17.988Z",
        "dateUpdated": "2025-10-01T17:23:29.836Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.