CVE-2026-31747 (GCVE-0-2026-31747)
Vulnerability from cvelistv5
Published
2026-05-01 14:14
Modified
2026-05-01 14:14
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: ac584af599452748187cf6d7865b1607c54ee443 Version: ac584af599452748187cf6d7865b1607c54ee443 Version: ac584af599452748187cf6d7865b1607c54ee443 Version: ac584af599452748187cf6d7865b1607c54ee443 Version: ac584af599452748187cf6d7865b1607c54ee443 Version: ac584af599452748187cf6d7865b1607c54ee443 Version: ac584af599452748187cf6d7865b1607c54ee443 Version: ac584af599452748187cf6d7865b1607c54ee443 |
||
{
"containers": {
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"product": "Linux",
"programFiles": [
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"vendor": "Linux",
"versions": [
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"version": "3.19"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.134",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.81",
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},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.22",
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},
{
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"status": "unaffected",
"version": "6.19.12",
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},
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"status": "unaffected",
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}
]
}
],
"cpeApplicability": [
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],
"descriptions": [
{
"lang": "en",
"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."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-01T14:14:40.844Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6"
},
{
"url": "https://git.kernel.org/stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2"
},
{
"url": "https://git.kernel.org/stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561"
},
{
"url": "https://git.kernel.org/stable/c/1603dd471f47762e9d1f52304edb3e49a7e62655"
},
{
"url": "https://git.kernel.org/stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5"
},
{
"url": "https://git.kernel.org/stable/c/eae19cab44204537f79146f15a51811b13227c38"
},
{
"url": "https://git.kernel.org/stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d"
},
{
"url": "https://git.kernel.org/stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7"
}
],
"title": "comedi: me4000: Fix potential overrun of firmware buffer",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-31747",
"datePublished": "2026-05-01T14:14:40.844Z",
"dateReserved": "2026-03-09T15:48:24.138Z",
"dateUpdated": "2026-05-01T14:14:40.844Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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