ghsa-jqcq-x2c2-xp7j
Vulnerability from github
Published
2025-08-16 12:30
Modified
2025-08-16 12:30
Details

In the Linux kernel, the following vulnerability has been resolved:

comedi: aio_iiro_16: Fix bit shift out of bounds

When checking for a supported IRQ number, the following test is used:

if ((1 << it->options[1]) & 0xdcfc) {

However, it->options[i] is an unchecked int value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring it->options[1] to be within bounds before proceeding with the original test. Valid it->options[1] values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38529"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-16T12:15:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: aio_iiro_16: Fix bit shift out of bounds\n\nWhen checking for a supported IRQ number, the following test is used:\n\n\tif ((1 \u003c\u003c it-\u003eoptions[1]) \u0026 0xdcfc) {\n\nHowever, `it-\u003eoptions[i]` is an unchecked `int` value from userspace, so\nthe shift amount could be negative or out of bounds.  Fix the test by\nrequiring `it-\u003eoptions[1]` to be within bounds before proceeding with\nthe original test.  Valid `it-\u003eoptions[1]` values that select the IRQ\nwill be in the range [1,15]. The value 0 explicitly disables the use of\ninterrupts.",
  "id": "GHSA-jqcq-x2c2-xp7j",
  "modified": "2025-08-16T12:30:32Z",
  "published": "2025-08-16T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38529"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43ddd82e6a91913cea1c078e782afd8de60c3a53"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66acb1586737a22dd7b78abc63213b1bcaa100e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/955e8835855fed8e87f7d8c8075564a1746c1b4c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0f3c0867d7d231c70984f05c97752caacd0daba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff30dd3f15f443d2a0085b12ec2cc95d44f35fa7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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