ghsa-8qpr-r3pf-7ggx
Vulnerability from github
Published
2025-08-19 18:31
Modified
2025-08-19 18:31
Details

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

bpf: handle jset (if a & b ...) as a jump in CFG computation

BPF_JSET is a conditional jump and currently verifier.c:can_jump() does not know about that. This can lead to incorrect live registers and SCC computation.

E.g. in the following example:

1: r0 = 1; 2: r2 = 2; 3: if r1 & 0x7 goto +1; 4: exit; 5: r0 = r2; 6: exit;

W/o this fix insn_successors(3) will return only (4), a jump to (5) would be missed and r2 won't be marked as alive at (3).

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38607"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-19T17:15:39Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: handle jset (if a \u0026 b ...) as a jump in CFG computation\n\nBPF_JSET is a conditional jump and currently verifier.c:can_jump()\ndoes not know about that. This can lead to incorrect live registers\nand SCC computation.\n\nE.g. in the following example:\n\n   1: r0 = 1;\n   2: r2 = 2;\n   3: if r1 \u0026 0x7 goto +1;\n   4: exit;\n   5: r0 = r2;\n   6: exit;\n\nW/o this fix insn_successors(3) will return only (4), a jump to (5)\nwould be missed and r2 won\u0027t be marked as alive at (3).",
  "id": "GHSA-8qpr-r3pf-7ggx",
  "modified": "2025-08-19T18:31:33Z",
  "published": "2025-08-19T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38607"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/261b30ad1516f4b9edd500aa6e8d6315c8fc109a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3157f7e2999616ac91f4d559a8566214f74000a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65eb166b8636365ad3d6e36d50a7c5edfe6cc66e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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