ghsa-m575-6r3m-823p
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:

bpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log

It's trivial for user to trigger "verifier log line truncated" warning, as verifier has a fixed-sized buffer of 1024 bytes (as of now), and there are at least two pieces of user-provided information that can be output through this buffer, and both can be arbitrarily sized by user: - BTF names; - BTF.ext source code lines strings.

Verifier log buffer should be properly sized for typical verifier state output. But it's sort-of expected that this buffer won't be long enough in some circumstances. So let's drop the check. In any case code will work correctly, at worst truncating a part of a single line output.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54145"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: drop unnecessary user-triggerable WARN_ONCE in verifierl log\n\nIt\u0027s trivial for user to trigger \"verifier log line truncated\" warning,\nas verifier has a fixed-sized buffer of 1024 bytes (as of now), and there are at\nleast two pieces of user-provided information that can be output through\nthis buffer, and both can be arbitrarily sized by user:\n  - BTF names;\n  - BTF.ext source code lines strings.\n\nVerifier log buffer should be properly sized for typical verifier state\noutput. But it\u0027s sort-of expected that this buffer won\u0027t be long enough\nin some circumstances. So let\u0027s drop the check. In any case code will\nwork correctly, at worst truncating a part of a single line output.",
  "id": "GHSA-m575-6r3m-823p",
  "modified": "2025-12-24T15:30:39Z",
  "published": "2025-12-24T15:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54145"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40c88c429a598006f91ad7a2b89856cd50b3a008"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/926a175026fed5d534f587ea4ec3ec49265cd3c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cff36398bd4c7d322d424433db437f3c3391c491"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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