CVE-2024-26944

{"id": "CVE-2024-26944", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-05-01T06:15:10.010", "references": [{"url": "https://git.kernel.org/stable/c/1ec17ef59168a1a6f1105f5dc517f783839a5302", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/34ca809e055eca5cfe63d9c7efbf80b7c21b4e57", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1ec17ef59168a1a6f1105f5dc517f783839a5302", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/34ca809e055eca5cfe63d9c7efbf80b7c21b4e57", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: fix use-after-free in do_zone_finish()\n\nShinichiro reported the following use-after-free triggered by the device\nreplace operation in fstests btrfs/070.\n\n BTRFS info (device nullb1): scrub: finished on devid 1 with status: 0\n ==================================================================\n BUG: KASAN: slab-use-after-free in do_zone_finish+0x91a/0xb90 [btrfs]\n Read of size 8 at addr ffff8881543c8060 by task btrfs-cleaner/3494007\n\n CPU: 0 PID: 3494007 Comm: btrfs-cleaner Tainted: G W 6.8.0-rc5-kts #1\n Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\n Call Trace:\n <TASK>\n dump_stack_lvl+0x5b/0x90\n print_report+0xcf/0x670\n ? __virt_addr_valid+0x200/0x3e0\n kasan_report+0xd8/0x110\n ? do_zone_finish+0x91a/0xb90 [btrfs]\n ? do_zone_finish+0x91a/0xb90 [btrfs]\n do_zone_finish+0x91a/0xb90 [btrfs]\n btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs]\n ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs]\n ? btrfs_put_root+0x2d/0x220 [btrfs]\n ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs]\n cleaner_kthread+0x21e/0x380 [btrfs]\n ? __pfx_cleaner_kthread+0x10/0x10 [btrfs]\n kthread+0x2e3/0x3c0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x31/0x70\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n </TASK>\n\n Allocated by task 3493983:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0xaa/0xb0\n btrfs_alloc_device+0xb3/0x4e0 [btrfs]\n device_list_add.constprop.0+0x993/0x1630 [btrfs]\n btrfs_scan_one_device+0x219/0x3d0 [btrfs]\n btrfs_control_ioctl+0x26e/0x310 [btrfs]\n __x64_sys_ioctl+0x134/0x1b0\n do_syscall_64+0x99/0x190\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n Freed by task 3494056:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3f/0x60\n poison_slab_object+0x102/0x170\n __kasan_slab_free+0x32/0x70\n kfree+0x11b/0x320\n btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs]\n btrfs_dev_replace_finishing+0xd7e/0x14f0 [btrfs]\n btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs]\n btrfs_ioctl+0xb27/0x57d0 [btrfs]\n __x64_sys_ioctl+0x134/0x1b0\n do_syscall_64+0x99/0x190\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n The buggy address belongs to the object at ffff8881543c8000\n which belongs to the cache kmalloc-1k of size 1024\n The buggy address is located 96 bytes inside of\n freed 1024-byte region [ffff8881543c8000, ffff8881543c8400)\n\n The buggy address belongs to the physical page:\n page:00000000fe2c1285 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1543c8\n head:00000000fe2c1285 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n flags: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n page_type: 0xffffffff()\n raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ^\n ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nThis UAF happens because we're accessing stale zone information of a\nalready removed btrfs_device in do_zone_finish().\n\nThe sequence of events is as follows:\n\nbtrfs_dev_replace_start\n btrfs_scrub_dev\n btrfs_dev_replace_finishing\n btrfs_dev_replace_update_device_in_mapping_tree <-- devices replaced\n btrfs_rm_dev_replace_free_srcdev\n btrfs_free_device <-- device freed\n\ncleaner_kthread\n btrfs_delete_unused_bgs\n btrfs_zone_finish\n do_zone_finish <-- refers the freed device\n\nThe reason for this is that we're using a\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: btrfs:zoned: corrige use-after-free en do_zone_finish() Shinichiro inform\u00f3 el siguiente use-after-free desencadenado por la operaci\u00f3n de reemplazo de dispositivo en fstests btrfs/070. Informaci\u00f3n BTRFS (dispositivo nullb1): limpieza: finalizado en el dispositivo 1 con estado: 0 ================================== ================================= ERROR: KASAN: uso de losa despu\u00e9s de liberarlo en do_zone_finish+0x91a/0xb90 [btrfs] Lectura del tama\u00f1o 8 en la direcci\u00f3n ffff8881543c8060 mediante la tarea btrfs-cleaner/3494007 CPU: 0 PID: 3494007 Comm: btrfs-cleaner Contaminado: GW 6.8.0-rc5-kts #1 Nombre del hardware: Supermicro Super Server/X11SPi-TF , BIOS 3.3 21/02/2020 Seguimiento de llamadas: dump_stack_lvl+0x5b/0x90 print_report+0xcf/0x670 ? __virt_addr_valid+0x200/0x3e0 kasan_report+0xd8/0x110 ? do_zone_finish+0x91a/0xb90 [btrfs]? do_zone_finish+0x91a/0xb90 [btrfs] do_zone_finish+0x91a/0xb90 [btrfs] btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs] ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs] ? btrfs_put_root+0x2d/0x220 [btrfs] ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs] clean_kthread+0x21e/0x380 [btrfs] ? __pfx_cleaner_kthread+0x10/0x10 [btrfs] kthread+0x2e3/0x3c0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x31/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 Asignado por tarea 3493983: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0xaa/0xb0 btrfs_alloc_device+0x b3/0x4e0 [btrfs] lista_dispositivo_add.constprop.0+0x993/ 0x1630 [btrfs] btrfs_scan_one_device+0x219/0x3d0 [btrfs] btrfs_control_ioctl+0x26e/0x310 [btrfs] __x64_sys_ioctl+0x134/0x1b0 do_syscall_64+0x99/0x190 entrada_SYSCALL_6 4_after_hwframe+0x6e/0x76 Liberado por la tarea 3494056: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3f/0x60 veneno_slab_object+0x102/0x170 __kasan_slab_free+0x32/0x70 kfree+0x11b/0x320 btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs_dev_replace_finishing+0xd 7e/0x14f0 [btrfs] btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs] btrfs_ioctl+0xb27/0x57d0 [ btrfs] __x64_sys_ioctl+0x134/0x1b0 do_syscall_64+0x99/0x190 Entry_SYSCALL_64_after_hwframe+0x6e/0x76 La direcci\u00f3n con errores pertenece al objeto en ffff8881543c8000 que pertenece al cach\u00e9 kmalloc-1k de tama\u00f1o 1024 Se encuentra la direcci\u00f3n con errores 96 bytes dentro de los 1024 bytes liberados regi\u00f3n [ffff8881543c8000, ffff8881543c8400) La direcci\u00f3n del error pertenece a la p\u00e1gina f\u00edsica: p\u00e1gina:00000000fe2c1285 refcount:1 mapcount:0 mapeo:00000000000000000 index:0x0 pfn:0x1543c8 head:00000000fe2c1285 entero_mapcount:0 nr_pages_mapped:0 pincount:0 banderas: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff) tipo de p\u00e1gina: 0xffffffff() raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002 raw: 0000000000 0000000000100010 00000001ffffffff 0000000000000000 p\u00e1gina volcada porque: kasan: mal acceso detectado Estado de la memoria alrededor de la direcci\u00f3n con errores : ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 &gt;ffff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Esta UAF sucede porque estamos acceder a informaci\u00f3n de zona obsoleta de un btrfs_device ya eliminado en do_zone_finish(). La secuencia de eventos es la siguiente: btrfs_dev_replace_start btrfs_scrub_dev btrfs_dev_replace_finishing btrfs_dev_replace_update_device_in_mapping_tree &lt;-- dispositivos reemplazados btrfs_rm_dev_replace_free_srcdev btrfs_free_device &lt;-- dispositivo liberado clean_kthread btrfs_delete_unused_ bgs btrfs_zone_finish do_zone_finish &lt;-- hace referencia al dispositivo liberado. La raz\u00f3n de esto es que estamos usando un ---truncado ---"}], "lastModified": "2025-01-14T14:29:21.517", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "45CAC835-1C61-4C27-A919-EF08207D3099", "versionEndExcluding": "6.8.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "22BEDD49-2C6D-402D-9DBF-6646F6ECD10B"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}