ghsa-cc8f-64j2-hxm7
Vulnerability from github
Published
2024-05-21 15:31
Modified
2024-12-26 18:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

comedi: Fix memory leak in compat_insnlist()

compat_insnlist() handles the 32-bit version of the COMEDI_INSNLIST ioctl (whenwhen CONFIG_COMPAT is enabled). It allocates memory to temporarily hold an array of struct comedi_insn converted from the 32-bit version in user space. This memory is only being freed if there is a fault while filling the array, otherwise it is leaked.

Add a call to kfree() to fix the leak.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47364"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:22Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Fix memory leak in compat_insnlist()\n\n`compat_insnlist()` handles the 32-bit version of the `COMEDI_INSNLIST`\nioctl (whenwhen `CONFIG_COMPAT` is enabled).  It allocates memory to\ntemporarily hold an array of `struct comedi_insn` converted from the\n32-bit version in user space.  This memory is only being freed if there\nis a fault while filling the array, otherwise it is leaked.\n\nAdd a call to `kfree()` to fix the leak.",
  "id": "GHSA-cc8f-64j2-hxm7",
  "modified": "2024-12-26T18:30:33Z",
  "published": "2024-05-21T15:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47364"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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