CVE-2026-31747 (GCVE-0-2026-31747)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-01 14:14
VLAI?
Title
comedi: me4000: Fix potential overrun of firmware buffer
Summary
In the Linux kernel, the following vulnerability has been resolved: comedi: me4000: Fix potential overrun of firmware buffer `me4000_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. 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`. Note: The firmware loading was totally broken before commit ac584af59945 ("staging: comedi: me4000: fix firmware downloading"), but that is the most sensible target for this fix.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ac584af599452748187cf6d7865b1607c54ee443 , < 8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6 (git)
Affected: ac584af599452748187cf6d7865b1607c54ee443 , < 64b24b713e1a3ea6624480594b4f8c2ff86502f2 (git)
Affected: ac584af599452748187cf6d7865b1607c54ee443 , < f72b5567f7c117b46b4058dc6a0c7554f8565561 (git)
Affected: ac584af599452748187cf6d7865b1607c54ee443 , < 1603dd471f47762e9d1f52304edb3e49a7e62655 (git)
Affected: ac584af599452748187cf6d7865b1607c54ee443 , < 99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5 (git)
Affected: ac584af599452748187cf6d7865b1607c54ee443 , < eae19cab44204537f79146f15a51811b13227c38 (git)
Affected: ac584af599452748187cf6d7865b1607c54ee443 , < de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d (git)
Affected: ac584af599452748187cf6d7865b1607c54ee443 , < 3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7 (git)
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    Linux Linux Affected: 3.19
Unaffected: 0 , < 3.19 (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/me4000.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: me4000: Fix potential overrun of firmware buffer\n\n`me4000_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.\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`.\n\nNote: The firmware loading was totally broken before commit ac584af59945\n(\"staging: comedi: me4000: fix firmware downloading\"), but that is the\nmost sensible target for this fix."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-01T14:14:40.844Z",
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    "dateReserved": "2026-03-09T15:48:24.138Z",
    "dateUpdated": "2026-05-01T14:14:40.844Z",
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  }
}


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  • 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.
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  • 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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