ghsa-x5rp-2v68-jcgf
Vulnerability from github
Published
2024-05-01 06:31
Modified
2024-06-27 15:30
Details

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

fs: sysfs: Fix reference leak in sysfs_break_active_protection()

The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released.

Fix the leak by adding an explicit kobject_put() call when kn is NULL.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-26993"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T06:15:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: sysfs: Fix reference leak in sysfs_break_active_protection()\n\nThe sysfs_break_active_protection() routine has an obvious reference\nleak in its error path.  If the call to kernfs_find_and_get() fails then\nkn will be NULL, so the companion sysfs_unbreak_active_protection()\nroutine won\u0027t get called (and would only cause an access violation by\ntrying to dereference kn-\u003eparent if it was called).  As a result, the\nreference to kobj acquired at the start of the function will never be\nreleased.\n\nFix the leak by adding an explicit kobject_put() call when kn is NULL.",
  "id": "GHSA-x5rp-2v68-jcgf",
  "modified": "2024-06-27T15:30:38Z",
  "published": "2024-05-01T06:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26993"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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