ghsa-wm2g-6m3r-4fx9
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
The handling of the COMEDI_INSNLIST ioctl allocates a kernel buffer to
hold the array of struct comedi_insn, getting the length from the
n_insns member of the struct comedi_insnlist supplied by the user.
The allocation will fail with a WARNING and a stack dump if it is too
large.
Avoid that by failing with an -EINVAL error if the supplied n_insns
value is unreasonable.
Define the limit on the n_insns value in the MAX_INSNS macro. Set
this to the same value as MAX_SAMPLES (65536), which is the maximum
allowed sum of the values of the member n in the array of struct
comedi_insn, and sensible comedi instructions will have an n of at
least 1.
{
"affected": [],
"aliases": [
"CVE-2025-38481"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-28T12:15:29Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large\n\nThe handling of the `COMEDI_INSNLIST` ioctl allocates a kernel buffer to\nhold the array of `struct comedi_insn`, getting the length from the\n`n_insns` member of the `struct comedi_insnlist` supplied by the user.\nThe allocation will fail with a WARNING and a stack dump if it is too\nlarge.\n\nAvoid that by failing with an `-EINVAL` error if the supplied `n_insns`\nvalue is unreasonable.\n\nDefine the limit on the `n_insns` value in the `MAX_INSNS` macro. Set\nthis to the same value as `MAX_SAMPLES` (65536), which is the maximum\nallowed sum of the values of the member `n` in the array of `struct\ncomedi_insn`, and sensible comedi instructions will have an `n` of at\nleast 1.",
"id": "GHSA-wm2g-6m3r-4fx9",
"modified": "2025-07-28T12:30:35Z",
"published": "2025-07-28T12:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38481"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/08ae4b20f5e82101d77326ecab9089e110f224cc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/992d600f284e719242a434166e86c1999649b71c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c9d3d9667443caafa804cd07940aeaef8e53aa90"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e3b8322cc8081d142ee4c1a43e1d702bdba1ed76"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- 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.