github - ghsa-4g7m-g45x-47rp

ghsa-4g7m-g45x-47rp

Vulnerability from github

Published

2024-06-19 15:30

Modified

2024-06-19 15:30

Details

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

ovl: fix warning in ovl_create_real()

Syzbot triggered the following warning in ovl_workdir_create() -> ovl_create_real():

if (!err && WARN_ON(!newdentry->d_inode)) {

The reason is that the cgroup2 filesystem returns from mkdir without instantiating the new dentry.

Weird filesystems such as this will be rejected by overlayfs at a later stage during setup, but to prevent such a warning, call ovl_mkdir_real() directly from ovl_workdir_create() and reject this case early.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47579"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-19T15:15:52Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix warning in ovl_create_real()\n\nSyzbot triggered the following warning in ovl_workdir_create() -\u003e\novl_create_real():\n\n\tif (!err \u0026\u0026 WARN_ON(!newdentry-\u003ed_inode)) {\n\nThe reason is that the cgroup2 filesystem returns from mkdir without\ninstantiating the new dentry.\n\nWeird filesystems such as this will be rejected by overlayfs at a later\nstage during setup, but to prevent such a warning, call ovl_mkdir_real()\ndirectly from ovl_workdir_create() and reject this case early.",
  "id": "GHSA-4g7m-g45x-47rp",
  "modified": "2024-06-19T15:30:55Z",
  "published": "2024-06-19T15:30:54Z",
  "references": [
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47579"
    },
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  "schema_version": "1.4.0",
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}

cve-2021-47579

Vulnerability from cvelistv5

Published

2024-06-19 14:53

Modified

2024-11-04 12:08

Severity ?

Summary

ovl: fix warning in ovl_create_real()

References

▼	URL	Tags
	https://git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8
	https://git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0
	https://git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7
	https://git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02
	https://git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
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.

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