CVE-2026-31748 (GCVE-0-2026-31748)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-01 14:14
VLAI?
Title
comedi: me_daq: Fix potential overrun of firmware buffer
Summary
In the Linux kernel, the following vulnerability has been resolved: comedi: me_daq: Fix potential overrun of firmware buffer `me2600_xilinx_download()` loads the firmware that was requested by `request_firmware()`. It is possible for it to overrun the source buffer because it blindly trusts the file format. It reads a data stream length from the first 4 bytes into variable `file_length` and reads the data stream contents of length `file_length` from offset 16 onwards. Although it checks that the supplied firmware is at least 16 bytes long, it does not check that it is long enough to contain the data stream. Add a test to ensure that the supplied firmware is long enough to contain the header and the data stream. On failure, log an error and return `-EINVAL`.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < 2fc25a4c2e055cd42ea39a1b42c89bfef70e0319 (git)
Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < 9f39fa07259eb342908e4aa0271dee038a8ce4f8 (git)
Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < f3f8ec00cfb8d8e826e30b1138a56355b88e9ba8 (git)
Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < c16ac4e173a05011437a2d868f70cc415339065a (git)
Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < 1bf8761eb59e94bf7b8c17b2a1ee48f14378b172 (git)
Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < a47ae40339c1048f519df33ff8840731720f57cb (git)
Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < c8c607a77aab783f2e38cc2e0f24aa6c8f6d200b (git)
Affected: 85acac61096f946a78cf0c4b65f7cebe580693b6 , < cc797d4821c754c701d9714b58bea947e31dbbe0 (git)
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    Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/comedi/drivers/me_daq.c"
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      ],
      "cpeApplicability": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: me_daq: Fix potential overrun of firmware buffer\n\n`me2600_xilinx_download()` loads the firmware that was requested by\n`request_firmware()`.  It is possible for it to overrun the source\nbuffer because it blindly trusts the file format.  It reads a data\nstream length from the first 4 bytes into variable `file_length` and\nreads the data stream contents of length `file_length` from offset 16\nonwards.  Although it checks that the supplied firmware is at least 16\nbytes long, it does not check that it is long enough to contain the data\nstream.\n\nAdd a test to ensure that the supplied firmware is long enough to\ncontain the header and the data stream.  On failure, log an error and\nreturn `-EINVAL`."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-01T14:14:41.545Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "dateReserved": "2026-03-09T15:48:24.138Z",
    "dateUpdated": "2026-05-01T14:14:41.545Z",
    "state": "PUBLISHED"
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  }
}


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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.

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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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