ghsa-75vm-7626-f557
Vulnerability from github
Published
2024-10-21 21:30
Modified
2024-10-24 21:31
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:

libbpf: Handle size overflow for ringbuf mmap

The maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries will overflow u32 when mapping producer page and data pages. Only casting max_entries to size_t is not enough, because for 32-bits application on 64-bits kernel the size of read-only mmap region also could overflow size_t.

So fixing it by casting the size of read-only mmap region into a __u64 and checking whether or not there will be overflow during mmap.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49030"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:13Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibbpf: Handle size overflow for ringbuf mmap\n\nThe maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries\nwill overflow u32 when mapping producer page and data pages. Only\ncasting max_entries to size_t is not enough, because for 32-bits\napplication on 64-bits kernel the size of read-only mmap region\nalso could overflow size_t.\n\nSo fixing it by casting the size of read-only mmap region into a __u64\nand checking whether or not there will be overflow during mmap.",
  "id": "GHSA-75vm-7626-f557",
  "modified": "2024-10-24T21:31:02Z",
  "published": "2024-10-21T21:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49030"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0140e079a42064680394fff1199a7b5483688dec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/535a25ab4f9a45f74ba38ab71de95e97474922ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a549ab6724520aa3c07f47e0eba820293551490"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/927cbb478adf917e0a142b94baa37f06279cc466"
    }
  ],
  "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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