CVE-2026-23092 (GCVE-0-2026-23092)
Vulnerability from cvelistv5
Published
2026-02-04 16:08
Modified
2026-05-11 21:59
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: dac: ad3552r-hs: fix out-of-bound write in ad3552r_hs_write_data_source When simple_write_to_buffer() succeeds, it returns the number of bytes actually copied to the buffer. The code incorrectly uses 'count' as the index for null termination instead of the actual bytes copied. If count exceeds the buffer size, this leads to out-of-bounds write. Add a check for the count and use the return value as the index. The bug was validated using a demo module that mirrors the original code and was tested under QEMU. Pattern of the bug: - A fixed 64-byte stack buffer is filled using count. - If count > 64, the code still does buf[count] = '\0', causing an - out-of-bounds write on the stack. Steps for reproduce: - Opens the device node. - Writes 128 bytes of A to it. - This overflows the 64-byte stack buffer and KASAN reports the OOB. Found via static analysis. This is similar to the commit da9374819eb3 ("iio: backend: fix out-of-bound write")
References
Impacted products
Vendor Product Version
Linux Linux Version: b1c5d68ea66e511dfb16cd0e6a730488bd3c3317
Version: b1c5d68ea66e511dfb16cd0e6a730488bd3c3317
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/dac/ad3552r-hs.c"
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          "vendor": "Linux",
          "versions": [
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            {
              "lessThan": "978d28136c53df38f8f0b747191930e2f95e9084",
              "status": "affected",
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.16"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
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              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.8",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: dac: ad3552r-hs: fix out-of-bound write in ad3552r_hs_write_data_source\n\nWhen simple_write_to_buffer() succeeds, it returns the number of bytes\nactually copied to the buffer. The code incorrectly uses \u0027count\u0027\nas the index for null termination instead of the actual bytes copied.\nIf count exceeds the buffer size, this leads to out-of-bounds write.\nAdd a check for the count and use the return value as the index.\n\nThe bug was validated using a demo module that mirrors the original\ncode and was tested under QEMU.\n\nPattern of the bug:\n- A fixed 64-byte stack buffer is filled using count.\n- If count \u003e 64, the code still does buf[count] = \u0027\\0\u0027, causing an\n- out-of-bounds write on the stack.\n\nSteps for reproduce:\n- Opens the device node.\n- Writes 128 bytes of A to it.\n- This overflows the 64-byte stack buffer and KASAN reports the OOB.\n\nFound via static analysis. This is similar to the\ncommit da9374819eb3 (\"iio: backend: fix out-of-bound write\")"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:59:50.750Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/db16e7c52032c79156930a337ee17232931794ba"
        },
        {
          "url": "https://git.kernel.org/stable/c/978d28136c53df38f8f0b747191930e2f95e9084"
        }
      ],
      "title": "iio: dac: ad3552r-hs: fix out-of-bound write in ad3552r_hs_write_data_source",
      "x_generator": {
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23092",
    "datePublished": "2026-02-04T16:08:15.203Z",
    "dateReserved": "2026-01-13T15:37:45.962Z",
    "dateUpdated": "2026-05-11T21:59:50.750Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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