nvd-json-data-feeds/CVE-2024/CVE-2024-269xx/CVE-2024-26983.json

{
  "id": "CVE-2024-26983",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-05-01T06:15:15.747",
  "lastModified": "2024-05-13T08:15:10.750",
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbootconfig: use memblock_free_late to free xbc memory to buddy\n\nOn the time to free xbc memory in xbc_exit(), memblock may has handed\nover memory to buddy allocator. So it doesn't make sense to free memory\nback to memblock. memblock_free() called by xbc_exit() even causes UAF bugs\non architectures with CONFIG_ARCH_KEEP_MEMBLOCK disabled like x86.\nFollowing KASAN logs shows this case.\n\nThis patch fixes the xbc memory free problem by calling memblock_free()\nin early xbc init error rewind path and calling memblock_free_late() in\nxbc exit path to free memory to buddy allocator.\n\n[    9.410890] ==================================================================\n[    9.418962] BUG: KASAN: use-after-free in memblock_isolate_range+0x12d/0x260\n[    9.426850] Read of size 8 at addr ffff88845dd30000 by task swapper/0/1\n\n[    9.435901] CPU: 9 PID: 1 Comm: swapper/0 Tainted: G     U             6.9.0-rc3-00208-g586b5dfb51b9 #5\n[    9.446403] Hardware name: Intel Corporation RPLP LP5 (CPU:RaptorLake)/RPLP LP5 (ID:13), BIOS IRPPN02.01.01.00.00.19.015.D-00000000 Dec 28 2023\n[    9.460789] Call Trace:\n[    9.463518]  <TASK>\n[    9.465859]  dump_stack_lvl+0x53/0x70\n[    9.469949]  print_report+0xce/0x610\n[    9.473944]  ? __virt_addr_valid+0xf5/0x1b0\n[    9.478619]  ? memblock_isolate_range+0x12d/0x260\n[    9.483877]  kasan_report+0xc6/0x100\n[    9.487870]  ? memblock_isolate_range+0x12d/0x260\n[    9.493125]  memblock_isolate_range+0x12d/0x260\n[    9.498187]  memblock_phys_free+0xb4/0x160\n[    9.502762]  ? __pfx_memblock_phys_free+0x10/0x10\n[    9.508021]  ? mutex_unlock+0x7e/0xd0\n[    9.512111]  ? __pfx_mutex_unlock+0x10/0x10\n[    9.516786]  ? kernel_init_freeable+0x2d4/0x430\n[    9.521850]  ? __pfx_kernel_init+0x10/0x10\n[    9.526426]  xbc_exit+0x17/0x70\n[    9.529935]  kernel_init+0x38/0x1e0\n[    9.533829]  ? _raw_spin_unlock_irq+0xd/0x30\n[    9.538601]  ret_from_fork+0x2c/0x50\n[    9.542596]  ? __pfx_kernel_init+0x10/0x10\n[    9.547170]  ret_from_fork_asm+0x1a/0x30\n[    9.551552]  </TASK>\n\n[    9.555649] The buggy address belongs to the physical page:\n[    9.561875] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x45dd30\n[    9.570821] flags: 0x200000000000000(node=0|zone=2)\n[    9.576271] page_type: 0xffffffff()\n[    9.580167] raw: 0200000000000000 ffffea0011774c48 ffffea0012ba1848 0000000000000000\n[    9.588823] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000\n[    9.597476] page dumped because: kasan: bad access detected\n\n[    9.605362] Memory state around the buggy address:\n[    9.610714]  ffff88845dd2ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[    9.618786]  ffff88845dd2ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[    9.626857] >ffff88845dd30000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[    9.634930]                    ^\n[    9.638534]  ffff88845dd30080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[    9.646605]  ffff88845dd30100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[    9.654675] =================================================================="
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bootconfig: use memblock_free_late para liberar memoria xbc para el amigo En el momento de liberar memoria xbc en xbc_exit(), es posible que memblock haya entregado la memoria al asignador de amigos. Por lo tanto, no tiene sentido liberar memoria en Memblock. memblock_free() llamado por xbc_exit() incluso causa errores UAF en arquitecturas con CONFIG_ARCH_KEEP_MEMBLOCK deshabilitado como x86. Los siguientes registros de KASAN muestran este caso. Este parche soluciona el problema de falta de memoria de xbc llamando a memblock_free() en la ruta de rebobinado del error de inicio temprano de xbc y llamando a memblock_free_late() en la ruta de salida de xbc para liberar memoria al asignador de amigos. [9.410890] ================================================= =================== [9.418962] ERROR: KASAN: use-after-free en memblock_isolate_range+0x12d/0x260 [9.426850] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88845dd30000 por el intercambiador de tareas /0/1 [ 9.435901] CPU: 9 PID: 1 Comm: swapper/0 Contaminado: GU 6.9.0-rc3-00208-g586b5dfb51b9 #5 [ 9.446403] Nombre de hardware: Intel Corporation RPLP LP5 (CPU:RaptorLake)/RPLP LP5 (ID:13), BIOS IRPPN02.01.01.00.00.19.015.D-00000000 28 de diciembre de 2023 [9.460789] Seguimiento de llamadas: [9.463518]  [9.465859] dump_stack_lvl+0x53/0x70 [9.469949] puerto+0xce/0x610 [ 9.473944] ? __virt_addr_valid+0xf5/0x1b0 [9.478619]? memblock_isolate_range+0x12d/0x260 [ 9.483877] kasan_report+0xc6/0x100 [ 9.487870] ? memblock_isolate_range+0x12d/0x260 [9.493125] memblock_isolate_range+0x12d/0x260 [9.498187] memblock_phys_free+0xb4/0x160 [9.502762]? __pfx_memblock_phys_free+0x10/0x10 [9.508021]? mutex_unlock+0x7e/0xd0 [9.512111]? __pfx_mutex_unlock+0x10/0x10 [9.516786]? kernel_init_freeable+0x2d4/0x430 [9.521850]? __pfx_kernel_init+0x10/0x10 [ 9.526426] xbc_exit+0x17/0x70 [ 9.529935] kernel_init+0x38/0x1e0 [ 9.533829] ? _raw_spin_unlock_irq+0xd/0x30 [9.538601] ret_from_fork+0x2c/0x50 [9.542596]? __pfx_kernel_init+0x10/0x10 [ 9.547170] ret_from_fork_asm+0x1a/0x30 [ 9.551552]  [ 9.555649] La direcci\u00f3n con errores pertenece a la p\u00e1gina f\u00edsica: [ 9.561875] p\u00e1gina: refcount:0 mapcount:0 mapeo:00000000000 \u00cdndice 00000: 0x1 pfn :0x45dd30 [ 9.570821] banderas: 0x200000000000000(nodo=0|zona=2) [ 9.576271] tipo de p\u00e1gina: 0xffffffff() [ 9.580167] raw: 0200000000000000 ffffea0011774c48 12ba1848 0000000000000000 [9.588823] raw: 0000000000000001 0000000000000000 00000000ffffffff 000000000000000000000000 [9.597476] p\u00e1gina volcada porque: kasan: mal acceso detectado [9.605362] Estado de la memoria alrededor de la direcci\u00f3n con errores: [9.610714] ffff88845dd2ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 9.618786] ffff88845dd2ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 9.626857] &gt;ffff88845dd30000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 9.634930] ^ [ 9.638534] ffff88845dd30080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 9.646605] ffff88845dd30100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 9.654675] ======================= ==============================================="
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1e7feb31a18c197d63a5e606025ed63c762f8918",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5a7dfb8fcd3f29fc93161100179b27f24f3d5f35",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/89f9a1e876b5a7ad884918c03a46831af202c8a0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e46d3be714ad9652480c6db129ab8125e2d20ab7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}