CVE-2022-49846

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49846
In the Linux kernel, the following vulnerability has been resolved: udf: Fix a slab-out-of-bounds write bug in udf_find_entry() Syzbot reported a slab-out-of-bounds Write bug: loop0: detected capacity change from 0 to 2048 ================================================================== BUG: KASAN: slab-out-of-bounds in udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 Write of size 105 at addr ffff8880123ff896 by task syz-executor323/3610 CPU: 0 PID: 3610 Comm: syz-executor323 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0 Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 udf_lookup+0xef/0x340 fs/udf/namei.c:309 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10e6/0x2df0 fs/namei.c:3710 do_filp_open+0x264/0x4f0 fs/namei.c:3740 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffab0d164d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1a7e6bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffab0d164d9 RDX: 00007ffab0d164d9 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007ffab0cd5a10 R08: 0000000000000000 R09: 0000000000000000 R10: 00005555573552c0 R11: 0000000000000246 R12: 00007ffab0cd5aa0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Allocated by task 3610: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:576 [inline] udf_find_entry+0x7b6/0x14f0 fs/udf/namei.c:243 udf_lookup+0xef/0x340 fs/udf/namei.c:309 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10e6/0x2df0 fs/namei.c:3710 do_filp_open+0x264/0x4f0 fs/namei.c:3740 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880123ff800 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 150 bytes inside of 256-byte region [ffff8880123ff800, ffff8880123ff900) The buggy address belongs to the physical page: page:ffffea000048ff80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x123fe head:ffffea000048ff80 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00004b8500 dead000000000003 ffff888012041b40 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x0(), pid 1, tgid 1 (swapper/0), ts 1841222404, free_ts 0 create_dummy_stack mm/page_owner.c: ---truncated---

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/03f9582a6a2ebd25a440896475c968428c4b63e7 Patch
https://git.kernel.org/stable/c/583fdd98d94acba1e7225e5cc29063aef0741030 Patch
https://git.kernel.org/stable/c/7a6051d734f1ed0031e2216f9a538621235c11a4 Patch
https://git.kernel.org/stable/c/ac79001b8e603226fab17240a79cb9ef679d3cd9 Patch
https://git.kernel.org/stable/c/c736ed8541605e3a25075bb1cbf8f38cb3083238 Patch
https://git.kernel.org/stable/c/c8af247de385ce49afabc3bf1cf4fd455c94bfe8 Patch
https://git.kernel.org/stable/c/d8971f410739a864c537e0ac29344a7b6c450232 Patch
https://git.kernel.org/stable/c/f1517721c408631f09d54c743aa70cb07fd3eebd Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
History

07 May 2025, 13:32

Type Values Removed Values Added
CWE CWE-787
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
References () https://git.kernel.org/stable/c/03f9582a6a2ebd25a440896475c968428c4b63e7 - () https://git.kernel.org/stable/c/03f9582a6a2ebd25a440896475c968428c4b63e7 - Patch
References () https://git.kernel.org/stable/c/583fdd98d94acba1e7225e5cc29063aef0741030 - () https://git.kernel.org/stable/c/583fdd98d94acba1e7225e5cc29063aef0741030 - Patch
References () https://git.kernel.org/stable/c/7a6051d734f1ed0031e2216f9a538621235c11a4 - () https://git.kernel.org/stable/c/7a6051d734f1ed0031e2216f9a538621235c11a4 - Patch
References () https://git.kernel.org/stable/c/ac79001b8e603226fab17240a79cb9ef679d3cd9 - () https://git.kernel.org/stable/c/ac79001b8e603226fab17240a79cb9ef679d3cd9 - Patch
References () https://git.kernel.org/stable/c/c736ed8541605e3a25075bb1cbf8f38cb3083238 - () https://git.kernel.org/stable/c/c736ed8541605e3a25075bb1cbf8f38cb3083238 - Patch
References () https://git.kernel.org/stable/c/c8af247de385ce49afabc3bf1cf4fd455c94bfe8 - () https://git.kernel.org/stable/c/c8af247de385ce49afabc3bf1cf4fd455c94bfe8 - Patch
References () https://git.kernel.org/stable/c/d8971f410739a864c537e0ac29344a7b6c450232 - () https://git.kernel.org/stable/c/d8971f410739a864c537e0ac29344a7b6c450232 - Patch
References () https://git.kernel.org/stable/c/f1517721c408631f09d54c743aa70cb07fd3eebd - () https://git.kernel.org/stable/c/f1517721c408631f09d54c743aa70cb07fd3eebd - Patch

02 May 2025, 13:53

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: udf: Se corrige un error de escritura fuera de los límites en udf_find_entry() Syzbot informó un error de escritura fuera de los límites: loop0: se detectó un cambio de capacidad de 0 a 2048 ======================================================================= ERROR: KASAN: slab-out-of-bounds en udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 Escritura de tamaño 105 en la dirección ffff8880123ff896 por la tarea syz-executor323/3610 CPU: 0 PID: 3610 Comm: syz-executor323 No contaminado 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0 Nombre del hardware: Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2022 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 udf_lookup+0xef/0x340 fs/udf/namei.c:309 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10e6/0x2df0 fs/namei.c:3710 do_filp_open+0x264/0x4f0 fs/namei.c:3740 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffab0d164d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 &lt;48&gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe1a7e6bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffab0d164d9 RDX: 00007ffab0d164d9 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007ffab0cd5a10 R08: 0000000000000000 R09: 0000000000000000 R10: 00005555573552c0 R11: 0000000000000246 R12: 00007ffab0cd5aa0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Asignado por la tarea 3610: kasan_save_stack mm/kasan/common.c:45 [en línea] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [en línea] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:576 [en línea] udf_find_entry+0x7b6/0x14f0 fs/udf/namei.c:243 udf_lookup+0xef/0x340 fs/udf/namei.c:309 lookup_open fs/namei.c:3391 [en línea] open_last_lookups fs/namei.c:3481 [en línea] path_openat+0x10e6/0x2df0 fs/namei.c:3710 do_filp_open+0x264/0x4f0 fs/namei.c:3740 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [en línea] __do_sys_creat fs/open.c:1402 [en línea] __se_sys_creat fs/open.c:1396 [en línea] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd La dirección con errores pertenece al objeto en ffff8880123ff800 que pertenece a la caché kmalloc-256 de tamaño 256 La dirección con errores se encuentra 150 bytes dentro de la región de 256 bytes [ffff8880123ff800, ffff8880123ff900) La dirección con errores pertenece a la página física: page:ffffea000048ff80 refcount:1 mapcount:0 mapping:000000000000000 index:0x0 pfn:0x123fe cabeza:ffffea000048ff80 orden:1 compuesto_mapcount:0 compuesto_pincount:0 banderas: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) sin formato: 00fff00000010200 ffffea00004b8500 muerto000000000003 ffff888012041b40 sin formato: 000000000000000 0000000080100010 00000001ffffffff 0000000000000000 página volcada porque: kasan: se detectó un acceso incorrecto page_owner rastrea la página como asignada última página asignada mediante orden 0, migrationtype Inamovible, gfp_---truncado---

01 May 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 15:16

Updated : 2025-05-07 13:32

NVD link : CVE-2022-49846

Mitre link : CVE-2022-49846

CVE.ORG link : CVE-2022-49846

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-787

Out-of-bounds Write