CVE-2025-38671 (GCVE-0-2025-38671)
Vulnerability from cvelistv5
Published
2025-08-22 16:03
Modified
2025-08-28 14:44
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: qup: jump out of the loop in case of timeout Original logic only sets the return value but doesn't jump out of the loop if the bus is kept active by a client. This is not expected. A malicious or buggy i2c client can hang the kernel in this case and should be avoided. This is observed during a long time test with a PCA953x GPIO extender. Fix it by changing the logic to not only sets the return value, but also jumps out of the loop and return to the caller with -ETIMEDOUT.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d33913fce67a93c1eb83396c3c9d6b411dcab33
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42c4471b30fa203249f476dd42321cd7efb7f6a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89459f168b78e5c801dc8b7ad037b62898bc4f57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7982a14b3012527a9583d12525cd0dc9f8d8934
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acfa2948be630ad857535cb36153697f3cbf9ca9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c523bfba46c4b4d7676fb050909533a766698ecd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cbec4406998185e0311ae97dfacc649f9cd79b0b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d05ec13aa3eb868a60dc961b489053a643863ddc
Impacted products
Vendor Product Version
Linux Linux Version: fbfab1ab065879370541caf0e514987368eb41b2
Version: fbfab1ab065879370541caf0e514987368eb41b2
Version: fbfab1ab065879370541caf0e514987368eb41b2
Version: fbfab1ab065879370541caf0e514987368eb41b2
Version: fbfab1ab065879370541caf0e514987368eb41b2
Version: fbfab1ab065879370541caf0e514987368eb41b2
Version: fbfab1ab065879370541caf0e514987368eb41b2
Version: fbfab1ab065879370541caf0e514987368eb41b2
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   Linux Linux Version: 4.17
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i2c/busses/i2c-qup.c"
          ],
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.17"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "versionType": "semver"
            },
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            },
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              "status": "unaffected",
              "version": "5.15.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
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            {
              "lessThanOrEqual": "6.12.*",
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            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: qup: jump out of the loop in case of timeout\n\nOriginal logic only sets the return value but doesn\u0027t jump out of the\nloop if the bus is kept active by a client. This is not expected. A\nmalicious or buggy i2c client can hang the kernel in this case and\nshould be avoided. This is observed during a long time test with a\nPCA953x GPIO extender.\n\nFix it by changing the logic to not only sets the return value, but also\njumps out of the loop and return to the caller with -ETIMEDOUT."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-28T14:44:37.404Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
        {
          "url": "https://git.kernel.org/stable/c/acfa2948be630ad857535cb36153697f3cbf9ca9"
        },
        {
          "url": "https://git.kernel.org/stable/c/d05ec13aa3eb868a60dc961b489053a643863ddc"
        },
        {
          "url": "https://git.kernel.org/stable/c/c523bfba46c4b4d7676fb050909533a766698ecd"
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        {
          "url": "https://git.kernel.org/stable/c/0d33913fce67a93c1eb83396c3c9d6b411dcab33"
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          "url": "https://git.kernel.org/stable/c/89459f168b78e5c801dc8b7ad037b62898bc4f57"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7982a14b3012527a9583d12525cd0dc9f8d8934"
        }
      ],
      "title": "i2c: qup: jump out of the loop in case of timeout",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38671",
    "datePublished": "2025-08-22T16:03:02.151Z",
    "dateReserved": "2025-04-16T04:51:24.031Z",
    "dateUpdated": "2025-08-28T14:44:37.404Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38671\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-22T16:15:42.683\",\"lastModified\":\"2025-08-28T15:15:58.300\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ni2c: qup: jump out of the loop in case of timeout\\n\\nOriginal logic only sets the return value but doesn\u0027t jump out of the\\nloop if the bus is kept active by a client. This is not expected. A\\nmalicious or buggy i2c client can hang the kernel in this case and\\nshould be avoided. This is observed during a long time test with a\\nPCA953x GPIO extender.\\n\\nFix it by changing the logic to not only sets the return value, but also\\njumps out of the loop and return to the caller with -ETIMEDOUT.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i2c: qup: se sale del bucle en caso de tiempo de espera. La l\u00f3gica original solo establece el valor de retorno, pero no se sale del bucle si un cliente mantiene activo el bus. Esto es inesperado. Un cliente i2c malicioso o con errores puede bloquear el kernel en este caso, por lo que debe evitarse. Esto se observ\u00f3 durante una prueba prolongada con un extensor GPIO PCA953x. Para solucionarlo, cambie la l\u00f3gica para que no solo establezca el valor de retorno, sino que tambi\u00e9n se salga del bucle y regrese al llamador con -ETIMEDOUT.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0d33913fce67a93c1eb83396c3c9d6b411dcab33\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/42c4471b30fa203249f476dd42321cd7efb7f6a8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89459f168b78e5c801dc8b7ad037b62898bc4f57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a7982a14b3012527a9583d12525cd0dc9f8d8934\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/acfa2948be630ad857535cb36153697f3cbf9ca9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c523bfba46c4b4d7676fb050909533a766698ecd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cbec4406998185e0311ae97dfacc649f9cd79b0b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d05ec13aa3eb868a60dc961b489053a643863ddc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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