CVE-2026-63936 (GCVE-0-2026-63936)
Vulnerability from cvelistv5
Published
2026-07-19 14:55
Modified
2026-07-19 14:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: adc: mt6359: fix unchecked return value in mt6358_read_imp In mt6358_read_imp(), the variable val_v is passed to regmap_read() but the return value is not checked. If the read fails, val_v remains uninitialized and its random stack content is subsequently reported as a measurement result. Initialize val_v to zero to ensure a predictable value is reported in case of bus failure and to prevent potential stack data leakage. This also satisfies static analyzers that might otherwise flag the variable as used uninitialized.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3587914bf61df7924933530353d840378cdc4973
Version: 3587914bf61df7924933530353d840378cdc4973
Version: 3587914bf61df7924933530353d840378cdc4973
Version: 3587914bf61df7924933530353d840378cdc4973
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          "programFiles": [
            "drivers/iio/adc/mt6359-auxadc.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: mt6359: fix unchecked return value in mt6358_read_imp\n\nIn mt6358_read_imp(), the variable val_v is passed to regmap_read()\nbut the return value is not checked. If the read fails, val_v remains\nuninitialized and its random stack content is subsequently reported\nas a measurement result.\n\nInitialize val_v to zero to ensure a predictable value is reported\nin case of bus failure and to prevent potential stack data leakage.\nThis also satisfies static analyzers that might otherwise flag the\nvariable as used uninitialized."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:33.942Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/f9bbd943c34a9ad60e593a4b99ce2394e4e2381b"
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      "title": "iio: adc: mt6359: fix unchecked return value in mt6358_read_imp",
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    "cveId": "CVE-2026-63936",
    "datePublished": "2026-07-19T14:55:33.942Z",
    "dateReserved": "2026-07-19T07:54:57.022Z",
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    "state": "PUBLISHED"
  },
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}


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