ghsa-7vw9-hmx7-h29g
Vulnerability from github
Published
2025-04-17 21:30
Modified
2025-04-17 21:30
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:

tracing: Fix potential double free in create_var_ref()

In create_var_ref(), init_var_ref() is called to initialize the fields of variable ref_field, which is allocated in the previous function call to create_hist_field(). Function init_var_ref() allocates the corresponding fields such as ref_field->system, but frees these fields when the function encounters an error. The caller later calls destroy_hist_field() to conduct error handling, which frees the fields and the variable itself. This results in double free of the fields which are already freed in the previous function.

Fix this by storing NULL to the corresponding fields when they are freed in init_var_ref().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49410"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:17Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix potential double free in create_var_ref()\n\nIn create_var_ref(), init_var_ref() is called to initialize the fields\nof variable ref_field, which is allocated in the previous function call\nto create_hist_field(). Function init_var_ref() allocates the\ncorresponding fields such as ref_field-\u003esystem, but frees these fields\nwhen the function encounters an error. The caller later calls\ndestroy_hist_field() to conduct error handling, which frees the fields\nand the variable itself. This results in double free of the fields which\nare already freed in the previous function.\n\nFix this by storing NULL to the corresponding fields when they are freed\nin init_var_ref().",
  "id": "GHSA-7vw9-hmx7-h29g",
  "modified": "2025-04-17T21:30:44Z",
  "published": "2025-04-17T21:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49410"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/058cb6d86b9789377216c936506b346aaa1eb581"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37443b3508b8cce6832f8d25cb4550b2f7801f50"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fdfb15e08598711dbf50daf56a33965232daf0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99696a2592bca641eb88cc9a80c90e591afebd0f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd83ff3bbfb003832481c9bff999d12385f396ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c27f744ceefadc7bbeb14233b6abc150ced617d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8b383f83cb573152c577eca1ef101e89995b72a"
    }
  ],
  "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"
    }
  ]
}


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