{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-49850",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-49850"
  ],
  "published": "2024-10-21T12:19:03Z",
  "summary": "bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos\n\nIn case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL\nreferencing a non-existing BTF type, function bpf_core_calc_relo_insn\nwould cause a null pointer deference.\n\nFix this by adding a proper check upper in call stack, as malformed\nrelocation records could be passed from user space.\n\nSimplest reproducer is a program:\n\n    r0 = 0\n    exit\n\nWith a single relocation record:\n\n    .insn_off = 0,          /* patch first instruction */\n    .type_id = 100500,      /* this type id does not exist */\n    .access_str_off = 6,    /* offset of string \"0\" */\n    .kind = BPF_CORE_TYPE_ID_LOCAL,\n\nSee the link for original reproducer or next commit for a test case.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-49850"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dc7ce14f00bcd50641f2110b7a32aa6552e0780f"
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      "url": "https://git.kernel.org/stable/c/2288b54b96dcb55bedebcef3572bb8821fc5e708"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/584cd3ff792e1edbea20b2a7df55897159b0be3e"
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      "url": "https://git.kernel.org/stable/c/e7e9c5b2dda29067332df2a85b0141a92b41f218"
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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}