GHSA-8VC2-H54Q-6258

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-28 09:31
VLAI
Details

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

net: mvpp2: limit XDP frame size to the RX buffer

mvpp2 has short and long BM pools, and short pool buffers can be smaller than PAGE_SIZE. The XDP path nevertheless initializes every xdp_buff with PAGE_SIZE as frame size.

XDP helpers use frame_sz to validate tail growth and to derive the hard end of the data area. Advertising PAGE_SIZE for short buffers can let bpf_xdp_adjust_tail() grow a packet past the real allocation, corrupting memory or later tripping skb tailroom checks.

Initialize the XDP buffer with bm_pool->frag_size so XDP tailroom matches the actual buffer backing the packet.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-53216"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:39Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mvpp2: limit XDP frame size to the RX buffer\n\nmvpp2 has short and long BM pools, and short pool buffers can be smaller\nthan PAGE_SIZE. The XDP path nevertheless initializes every xdp_buff with\nPAGE_SIZE as frame size.\n\nXDP helpers use frame_sz to validate tail growth and to derive the hard\nend of the data area. Advertising PAGE_SIZE for short buffers can let\nbpf_xdp_adjust_tail() grow a packet past the real allocation, corrupting\nmemory or later tripping skb tailroom checks.\n\nInitialize the XDP buffer with bm_pool-\u003efrag_size so XDP tailroom matches\nthe actual buffer backing the packet.",
  "id": "GHSA-8vc2-h54q-6258",
  "modified": "2026-06-28T09:31:45Z",
  "published": "2026-06-25T09:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53216"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b8b0c3631b19faee53f0d15a49924129b063eec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9545cc5ef18ca22d031f2f47c157192460652359"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/994bd2b58d2bd08aa97ec0836cc813cfcb00d749"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3ee9231ccec6ec3be2de89c56f897055fd9eab1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec8e1e5842bc0dbd4c272761f4db3651eecd0339"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3c6aa078927e6fe8121c9c591ddee8716c5305a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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