{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-58100",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-58100"
  ],
  "published": "2025-05-05T14:53:47Z",
  "summary": "bpf: check changes_pkt_data property for extension programs",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: check changes_pkt_data property for extension programs\n\nWhen processing calls to global sub-programs, verifier decides whether\nto invalidate all packet pointers in current state depending on the\nchanges_pkt_data property of the global sub-program.\n\nBecause of this, an extension program replacing a global sub-program\nmust be compatible with changes_pkt_data property of the sub-program\nbeing replaced.\n\nThis commit:\n- adds changes_pkt_data flag to struct bpf_prog_aux:\n  - this flag is set in check_cfg() for main sub-program;\n  - in jit_subprogs() for other sub-programs;\n- modifies bpf_check_attach_btf_id() to check changes_pkt_data flag;\n- moves call to check_attach_btf_id() after the call to check_cfg(),\n  because it needs changes_pkt_data flag to be set:\n\n    bpf_check:\n      ...                             ...\n    - check_attach_btf_id             resolve_pseudo_ldimm64\n      resolve_pseudo_ldimm64   -->    bpf_prog_is_offloaded\n      bpf_prog_is_offloaded           check_cfg\n      check_cfg                     + check_attach_btf_id\n      ...                             ...\n\nThe following fields are set by check_attach_btf_id():\n- env->ops\n- prog->aux->attach_btf_trace\n- prog->aux->attach_func_name\n- prog->aux->attach_func_proto\n- prog->aux->dst_trampoline\n- prog->aux->mod\n- prog->aux->saved_dst_attach_type\n- prog->aux->saved_dst_prog_type\n- prog->expected_attach_type\n\nNeither of these fields are used by resolve_pseudo_ldimm64() or\nbpf_prog_offload_verifier_prep() (for netronome and netdevsim\ndrivers), so the reordering is safe.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-58100"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7197fc4acdf238ec8ad06de5a8235df0c1f9c7d7"
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    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}