{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-38588",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-38588"
  ],
  "published": "2024-06-19T13:37:58Z",
  "summary": "ftrace: Fix possible use-after-free issue in ftrace_location()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix possible use-after-free issue in ftrace_location()\n\nKASAN reports a bug:\n\n  BUG: KASAN: use-after-free in ftrace_location+0x90/0x120\n  Read of size 8 at addr ffff888141d40010 by task insmod/424\n  CPU: 8 PID: 424 Comm: insmod Tainted: G        W          6.9.0-rc2+\n  [...]\n  Call Trace:\n   <TASK>\n   dump_stack_lvl+0x68/0xa0\n   print_report+0xcf/0x610\n   kasan_report+0xb5/0xe0\n   ftrace_location+0x90/0x120\n   register_kprobe+0x14b/0xa40\n   kprobe_init+0x2d/0xff0 [kprobe_example]\n   do_one_initcall+0x8f/0x2d0\n   do_init_module+0x13a/0x3c0\n   load_module+0x3082/0x33d0\n   init_module_from_file+0xd2/0x130\n   __x64_sys_finit_module+0x306/0x440\n   do_syscall_64+0x68/0x140\n   entry_SYSCALL_64_after_hwframe+0x71/0x79\n\nThe root cause is that, in lookup_rec(), ftrace record of some address\nis being searched in ftrace pages of some module, but those ftrace pages\nat the same time is being freed in ftrace_release_mod() as the\ncorresponding module is being deleted:\n\n           CPU1                       |      CPU2\n  register_kprobes() {                | delete_module() {\n    check_kprobe_address_safe() {     |\n      arch_check_ftrace_location() {  |\n        ftrace_location() {           |\n          lookup_rec() // USE!        |   ftrace_release_mod() // Free!\n\nTo fix this issue:\n  1. Hold rcu lock as accessing ftrace pages in ftrace_location_range();\n  2. Use ftrace_location_range() instead of lookup_rec() in\n     ftrace_location();\n  3. Call synchronize_rcu() before freeing any ftrace pages both in\n     ftrace_process_locs()/ftrace_release_mod()/ftrace_free_mem().",
  "affected": [
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        "name": "linux"
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        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1",
        "1:6.6.20-1+rpt1",
        "1:6.6.28-1+rpt1",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-38588"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/eea46baf145150910ba134f75a67106ba2222c1b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1880a324af1c95940a7c954b6b937e86844a33bd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8ea8ef5e42173560ac510e92a1cc797ffeea8831"
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dbff5f0bfb2416b8b55c105ddbcd4f885e98fada"
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7b4881da5b19f65709f5c18c1a4d8caa2e496461"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/66df065b3106964e667b37bf8f7e55ec69d0c1f6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/31310e373f4c8c74e029d4326b283e757edabc0b"
    },
    {
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      "url": "https://git.kernel.org/stable/c/e60b613df8b6253def41215402f72986fee3fc8d"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}