ghsa-4h53-xcvw-8wpx
Vulnerability from github
Published
2024-05-17 12:31
Modified
2024-07-03 18:42
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

cpumap: Zero-initialise xdp_rxq_info struct before running XDP program

When running an XDP program that is attached to a cpumap entry, we don't initialise the xdp_rxq_info data structure being used in the xdp_buff that backs the XDP program invocation. Tobias noticed that this leads to random values being returned as the xdp_md->rx_queue_index value for XDP programs running in a cpumap.

This means we're basically returning the contents of the uninitialised memory, which is bad. Fix this by zero-initialising the rxq data structure before running the XDP program.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-27431"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-17T12:15:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpumap: Zero-initialise xdp_rxq_info struct before running XDP program\n\nWhen running an XDP program that is attached to a cpumap entry, we don\u0027t\ninitialise the xdp_rxq_info data structure being used in the xdp_buff\nthat backs the XDP program invocation. Tobias noticed that this leads to\nrandom values being returned as the xdp_md-\u003erx_queue_index value for XDP\nprograms running in a cpumap.\n\nThis means we\u0027re basically returning the contents of the uninitialised\nmemory, which is bad. Fix this by zero-initialising the rxq data\nstructure before running the XDP program.",
  "id": "GHSA-4h53-xcvw-8wpx",
  "modified": "2024-07-03T18:42:22Z",
  "published": "2024-05-17T12:31:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27431"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2487007aa3b9fafbd2cb14068f49791ce1d7ede5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f4e51abfbe6eb444fa91906a5cd083044278297"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0363af9619c77730764f10360e36c6445c12f7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f562e4c4aab00986dde3093c4be919c3f2b85a4a"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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