{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-43840",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-43840"
  ],
  "published": "2024-08-17T09:22:42Z",
  "summary": "bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG\n\nWhen BPF_TRAMP_F_CALL_ORIG is set, the trampoline calls\n__bpf_tramp_enter() and __bpf_tramp_exit() functions, passing them\nthe struct bpf_tramp_image *im pointer as an argument in R0.\n\nThe trampoline generation code uses emit_addr_mov_i64() to emit\ninstructions for moving the bpf_tramp_image address into R0, but\nemit_addr_mov_i64() assumes the address to be in the vmalloc() space\nand uses only 48 bits. Because bpf_tramp_image is allocated using\nkzalloc(), its address can use more than 48-bits, in this case the\ntrampoline will pass an invalid address to __bpf_tramp_enter/exit()\ncausing a kernel crash.\n\nFix this by using emit_a64_mov_i64() in place of emit_addr_mov_i64()\nas it can work with addresses that are greater than 48-bits.",
  "affected": [
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        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.6.51-1+rpt2",
        "1:6.6.51-1+rpt3",
        "1:6.6.62-1+rpt1",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-43840"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/077149478497b2f00ff4fd9da2c892defa6418d8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d9664e6ff040798a46cdc5d401064f55b8676c83"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6d218fcc707d6b2c3616b6cd24b948fd4825cfec"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/19d3c179a37730caf600a97fed3794feac2b197b"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}