ghsa-3q3x-839r-4xrh
Vulnerability from github
Published
2024-07-30 09:32
Modified
2024-08-02 15:31
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

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

net: dsa: mv88e6xxx: Correct check for empty list

Since commit a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO busses") mv88e6xxx_default_mdio_bus() has checked that the return value of list_first_entry() is non-NULL.

This appears to be intended to guard against the list chip->mdios being empty. However, it is not the correct check as the implementation of list_first_entry is not designed to return NULL for empty lists.

Instead, use list_first_entry_or_null() which does return NULL if the list is empty.

Flagged by Smatch. Compile tested only.

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-42224"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-754"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-30T08:15:07Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mv88e6xxx: Correct check for empty list\n\nSince commit a3c53be55c95 (\"net: dsa: mv88e6xxx: Support multiple MDIO\nbusses\") mv88e6xxx_default_mdio_bus() has checked that the\nreturn value of list_first_entry() is non-NULL.\n\nThis appears to be intended to guard against the list chip-\u003emdios being\nempty.  However, it is not the correct check as the implementation of\nlist_first_entry is not designed to return NULL for empty lists.\n\nInstead, use list_first_entry_or_null() which does return NULL if the\nlist is empty.\n\nFlagged by Smatch.\nCompile tested only.",
  "id": "GHSA-3q3x-839r-4xrh",
  "modified": "2024-08-02T15:31:17Z",
  "published": "2024-07-30T09:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42224"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a2fe25a103cef73cde356e6d09da10f607e93f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3bf8d70e1455f87856640c3433b3660a31001618"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f25b5f1635449036692a44b771f39f772190c1d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47d28dde172696031c880c5778633cdca30394ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c2c3cca816d074c75a2801d1ca0dea7b0148114"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa03f591ef31ba603a4a99d05d25a0f21ab1cd89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f75625db838ade28f032dacd0f0c8baca42ecde4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.