ghsa-6qhr-h8jp-m2w8
Vulnerability from github
Published
2025-04-14 21:32
Modified
2025-04-14 21:32
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:

ksmbd: fix reference count leak in smb_check_perm_dacl()

The issue happens in a specific path in smb_check_perm_dacl(). When "id" and "uid" have the same value, the function simply jumps out of the loop without decrementing the reference count of the object "posix_acls", which is increased by get_acl() earlier. This may result in memory leaks.

Fix it by decreasing the reference count of "posix_acls" before jumping to label "check_access_bits".

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49366"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:13Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix reference count leak in smb_check_perm_dacl()\n\nThe issue happens in a specific path in smb_check_perm_dacl(). When\n\"id\" and \"uid\" have the same value, the function simply jumps out of\nthe loop without decrementing the reference count of the object\n\"posix_acls\", which is increased by get_acl() earlier. This may\nresult in memory leaks.\n\nFix it by decreasing the reference count of \"posix_acls\" before\njumping to label \"check_access_bits\".",
  "id": "GHSA-6qhr-h8jp-m2w8",
  "modified": "2025-04-14T21:32:22Z",
  "published": "2025-04-14T21:32:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49366"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf824b95c12a1abacadbc2d069931963221a3414"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724"
    }
  ],
  "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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