ghsa-mrhw-xcq4-7jw7
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

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

bpf: fix potential 32-bit overflow when accessing ARRAY map element

If BPF array map is bigger than 4GB, element pointer calculation can overflow because both index and elem_size are u32. Fix this everywhere by forcing 64-bit multiplication. Extract this formula into separate small helper and use it consistently in various places.

Speculative-preventing formula utilizing index_mask trick is left as is, but explicit u64 casts are added in both places.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50167"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:47Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix potential 32-bit overflow when accessing ARRAY map element\n\nIf BPF array map is bigger than 4GB, element pointer calculation can\noverflow because both index and elem_size are u32. Fix this everywhere\nby forcing 64-bit multiplication. Extract this formula into separate\nsmall helper and use it consistently in various places.\n\nSpeculative-preventing formula utilizing index_mask trick is left as is,\nbut explicit u64 casts are added in both places.",
  "id": "GHSA-mrhw-xcq4-7jw7",
  "modified": "2025-06-18T12:30:52Z",
  "published": "2025-06-18T12:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50167"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/063e092534d4c6785228e5b1eb6e9329f66ccbe4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c7256b880b3a5aa1895fd169a34aa4224a11862"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87ac0d600943994444e24382a87aa19acc4cd3d4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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