nvd-json-data-feeds/CVE-2022/CVE-2022-497xx/CVE-2022-49796.json

{
  "id": "CVE-2022-49796",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-05-01T15:16:02.887",
  "lastModified": "2025-05-02T13:53:20.943",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: kprobe: Fix potential null-ptr-deref on trace_array in kprobe_event_gen_test_exit()\n\nWhen test_gen_kprobe_cmd() failed after kprobe_event_gen_cmd_end(), it\nwill goto delete, which will call kprobe_event_delete() and release the\ncorresponding resource. However, the trace_array in gen_kretprobe_test\nwill point to the invalid resource. Set gen_kretprobe_test to NULL\nafter called kprobe_event_delete() to prevent null-ptr-deref.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000070\nPGD 0 P4D 0\nOops: 0000 [#1] SMP PTI\nCPU: 0 PID: 246 Comm: modprobe Tainted: G        W\n6.1.0-rc1-00174-g9522dc5c87da-dirty #248\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014\nRIP: 0010:__ftrace_set_clr_event_nolock+0x53/0x1b0\nCode: e8 82 26 fc ff 49 8b 1e c7 44 24 0c ea ff ff ff 49 39 de 0f 84 3c\n01 00 00 c7 44 24 18 00 00 00 00 e8 61 26 fc ff 48 8b 6b 10 <44> 8b 65\n70 4c 8b 6d 18 41 f7 c4 00 02 00 00 75 2f\nRSP: 0018:ffffc9000159fe00 EFLAGS: 00010293\nRAX: 0000000000000000 RBX: ffff88810971d268 RCX: 0000000000000000\nRDX: ffff8881080be600 RSI: ffffffff811b48ff RDI: ffff88810971d058\nRBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001\nR10: ffffc9000159fe58 R11: 0000000000000001 R12: ffffffffa0001064\nR13: ffffffffa000106c R14: ffff88810971d238 R15: 0000000000000000\nFS:  00007f89eeff6540(0000) GS:ffff88813b600000(0000)\nknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000070 CR3: 000000010599e004 CR4: 0000000000330ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n __ftrace_set_clr_event+0x3e/0x60\n trace_array_set_clr_event+0x35/0x50\n ? 0xffffffffa0000000\n kprobe_event_gen_test_exit+0xcd/0x10b [kprobe_event_gen_test]\n __x64_sys_delete_module+0x206/0x380\n ? lockdep_hardirqs_on_prepare+0xd8/0x190\n ? syscall_enter_from_user_mode+0x1c/0x50\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7f89eeb061b7"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing: kprobe: Se corrige la posible desreferencia de PTR nula en trace_array en kprobe_event_gen_test_exit(). Cuando test_gen_kprobe_cmd() falla despu\u00e9s de kprobe_event_gen_cmd_end(), se ejecuta el comando \"eliminar\", lo que llama a kprobe_event_delete() y libera el recurso correspondiente. Sin embargo, trace_array en gen_kretprobe_test apuntar\u00e1 al recurso no v\u00e1lido. Establezca gen_kretprobe_test en NULL despu\u00e9s de llamar a kprobe_event_delete() para evitar la desreferencia de PTR nula. ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000070 PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 0 PID: 246 Comm: modprobe Tainted: GW 6.1.0-rc1-00174-g9522dc5c87da-dirty #248 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 RIP: 0010:__ftrace_set_clr_event_nolock+0x53/0x1b0 Code: e8 82 26 fc ff 49 8b 1e c7 44 24 0c ea ff ff ff 49 39 de 0f 84 3c 01 00 00 c7 44 24 18 00 00 00 00 e8 61 26 fc ff 48 8b 6b 10 &lt;44&gt; 8b 65 70 4c 8b 6d 18 41 f7 c4 00 02 00 00 75 2f RSP: 0018:ffffc9000159fe00 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88810971d268 RCX: 0000000000000000 RDX: ffff8881080be600 RSI: ffffffff811b48ff RDI: ffff88810971d058 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffc9000159fe58 R11: 0000000000000001 R12: ffffffffa0001064 R13: ffffffffa000106c R14: ffff88810971d238 R15: 0000000000000000 FS: 00007f89eeff6540(0000) GS:ffff88813b600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000070 CR3: 000000010599e004 CR4: 0000000000330ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:  __ftrace_set_clr_event+0x3e/0x60 trace_array_set_clr_event+0x35/0x50 ? 0xffffffffa0000000 kprobe_event_gen_test_exit+0xcd/0x10b [kprobe_event_gen_test] __x64_sys_delete_module+0x206/0x380 ? lockdep_hardirqs_on_prepare+0xd8/0x190 ? syscall_enter_from_user_mode+0x1c/0x50 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f89eeb061b7 "
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/22ea4ca9631eb137e64e5ab899e9c89cb6670959",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/28a54854a95923b6266a9479ad660ca2cc0e1d5f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/510c12f93674ea0a1423b24f36c67357168a262a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e57daa750369fedbf678346aec724a43b9a51749",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}