ghsa-m4m9-v4mx-256j
Vulnerability from github
Published
2024-11-09 12:30
Modified
2024-11-13 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:

bpf: Fix out-of-bounds write in trie_get_next_key()

trie_get_next_key() allocates a node stack with size trie->max_prefixlen, while it writes (trie->max_prefixlen + 1) nodes to the stack when it has full paths from the root to leaves. For example, consider a trie with max_prefixlen is 8, and the nodes with key 0x00/0, 0x00/1, 0x00/2, ... 0x00/8 inserted. Subsequent calls to trie_get_next_key with _key with .prefixlen = 8 make 9 nodes be written on the node stack with size 8.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50262"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-09T11:15:11Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix out-of-bounds write in trie_get_next_key()\n\ntrie_get_next_key() allocates a node stack with size trie-\u003emax_prefixlen,\nwhile it writes (trie-\u003emax_prefixlen + 1) nodes to the stack when it has\nfull paths from the root to leaves. For example, consider a trie with\nmax_prefixlen is 8, and the nodes with key 0x00/0, 0x00/1, 0x00/2, ...\n0x00/8 inserted. Subsequent calls to trie_get_next_key with _key with\n.prefixlen = 8 make 9 nodes be written on the node stack with size 8.",
  "id": "GHSA-m4m9-v4mx-256j",
  "modified": "2024-11-13T21:30:32Z",
  "published": "2024-11-09T12:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50262"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/590976f921723d53ac199c01d5b7b73a94875e68"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86c8ebe02d8806dd8878d0063e8e185622ab6ea6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90a6e0e1e151ef7a9282e78f54c3091de2dcc99c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91afbc0eb3c90258ae378ae3c6ead3d2371e926d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a035df0b98df424559fd383e8e1a268f422ea2ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e8494ac079814a53fbc2258d2743e720907488ed"
    }
  ],
  "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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