ghsa-w8p6-7x4v-892g
Vulnerability from github
Published
2025-12-24 15:30
Modified
2025-12-24 15:30
Details

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

kheaders: Use array declaration instead of char

Under CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination and source buffers. Defining kernel_headers_data as "char" would trip this check. Since these addresses are treated as byte arrays, define them as arrays (as done everywhere else).

This was seen with:

$ cat /sys/kernel/kheaders.tar.xz >> /dev/null

detected buffer overflow in memcpy kernel BUG at lib/string_helpers.c:1027! ... RIP: 0010:fortify_panic+0xf/0x20 [...] Call Trace: ikheaders_read+0x45/0x50 [kheaders] kernfs_fop_read_iter+0x1a4/0x2f0 ...

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54056"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:07Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkheaders: Use array declaration instead of char\n\nUnder CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination\nand source buffers. Defining kernel_headers_data as \"char\" would trip\nthis check. Since these addresses are treated as byte arrays, define\nthem as arrays (as done everywhere else).\n\nThis was seen with:\n\n  $ cat /sys/kernel/kheaders.tar.xz \u003e\u003e /dev/null\n\n  detected buffer overflow in memcpy\n  kernel BUG at lib/string_helpers.c:1027!\n  ...\n  RIP: 0010:fortify_panic+0xf/0x20\n  [...]\n  Call Trace:\n   \u003cTASK\u003e\n   ikheaders_read+0x45/0x50 [kheaders]\n   kernfs_fop_read_iter+0x1a4/0x2f0\n  ...",
  "id": "GHSA-w8p6-7x4v-892g",
  "modified": "2025-12-24T15:30:36Z",
  "published": "2025-12-24T15:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54056"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a07d2d511e2703efd4387891d49e0326f1157f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/719459877d58c8aced5845c1e5b98d8d87d09197"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82d2e01b95c439fe55fab5e04fc83387c42d3a48"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b9f6845a492de20679b84bda6b08be347c5819da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6d1af6b8611801b585c53c0cc63626c8d339e96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcd2da2e6bf2640a31a2a5b118b50dc3635c707b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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