CVE-2024-50255

  1. Yack CVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-50255

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci: fix null-ptr-deref in hci_read_supported_codecs Fix __hci_cmd_sync_sk() to return not NULL for unknown opcodes. __hci_cmd_sync_sk() returns NULL if a command returns a status event. However, it also returns NULL where an opcode doesn't exist in the hci_cc table because hci_cmd_complete_evt() assumes status = skb->data[0] for unknown opcodes. This leads to null-ptr-deref in cmd_sync for HCI_OP_READ_LOCAL_CODECS as there is no hci_cc for HCI_OP_READ_LOCAL_CODECS, which always assumes status = skb->data[0]. KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 1 PID: 2000 Comm: kworker/u9:5 Not tainted 6.9.0-ga6bcb805883c-dirty #10 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: hci7 hci_power_on RIP: 0010:hci_read_supported_codecs+0xb9/0x870 net/bluetooth/hci_codec.c:138 Code: 08 48 89 ef e8 b8 c1 8f fd 48 8b 75 00 e9 96 00 00 00 49 89 c6 48 ba 00 00 00 00 00 fc ff df 4c 8d 60 70 4c 89 e3 48 c1 eb 03 <0f> b6 04 13 84 c0 0f 85 82 06 00 00 41 83 3c 24 02 77 0a e8 bf 78 RSP: 0018:ffff888120bafac8 EFLAGS: 00010212 RAX: 0000000000000000 RBX: 000000000000000e RCX: ffff8881173f0040 RDX: dffffc0000000000 RSI: ffffffffa58496c0 RDI: ffff88810b9ad1e4 RBP: ffff88810b9ac000 R08: ffffffffa77882a7 R09: 1ffffffff4ef1054 R10: dffffc0000000000 R11: fffffbfff4ef1055 R12: 0000000000000070 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810b9ac000 FS: 0000000000000000(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ddaa3439e CR3: 0000000139764003 CR4: 0000000000770ef0 PKRU: 55555554 Call Trace: <TASK> hci_read_local_codecs_sync net/bluetooth/hci_sync.c:4546 [inline] hci_init_stage_sync net/bluetooth/hci_sync.c:3441 [inline] hci_init4_sync net/bluetooth/hci_sync.c:4706 [inline] hci_init_sync net/bluetooth/hci_sync.c:4742 [inline] hci_dev_init_sync net/bluetooth/hci_sync.c:4912 [inline] hci_dev_open_sync+0x19a9/0x2d30 net/bluetooth/hci_sync.c:4994 hci_dev_do_open net/bluetooth/hci_core.c:483 [inline] hci_power_on+0x11e/0x560 net/bluetooth/hci_core.c:1015 process_one_work kernel/workqueue.c:3267 [inline] process_scheduled_works+0x8ef/0x14f0 kernel/workqueue.c:3348 worker_thread+0x91f/0xe50 kernel/workqueue.c:3429 kthread+0x2cb/0x360 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

References
Link Resource
https://git.kernel.org/stable/c/1e67d8641813f1876a42eeb4f532487b8a7fb0a8 Patch
https://git.kernel.org/stable/c/1f1764466c33a4466363b821a25cd65c46a5a793 Patch
https://git.kernel.org/stable/c/48d7c24b7ef6417c68f206566364db1f8087bb23 Patch
https://git.kernel.org/stable/c/5d9054b9f769a8e124c4fa02072437c864726baf Patch
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
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:6.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*
History

03 Nov 2025, 23:17

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html -

14 Nov 2024, 18:10

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/1e67d8641813f1876a42eeb4f532487b8a7fb0a8 - () https://git.kernel.org/stable/c/1e67d8641813f1876a42eeb4f532487b8a7fb0a8 - Patch
References () https://git.kernel.org/stable/c/1f1764466c33a4466363b821a25cd65c46a5a793 - () https://git.kernel.org/stable/c/1f1764466c33a4466363b821a25cd65c46a5a793 - Patch
References () https://git.kernel.org/stable/c/48d7c24b7ef6417c68f206566364db1f8087bb23 - () https://git.kernel.org/stable/c/48d7c24b7ef6417c68f206566364db1f8087bb23 - Patch
References () https://git.kernel.org/stable/c/5d9054b9f769a8e124c4fa02072437c864726baf - () https://git.kernel.org/stable/c/5d9054b9f769a8e124c4fa02072437c864726baf - Patch
CWE CWE-476
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*

12 Nov 2024, 13:56

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: hci: corregir null-ptr-deref en hci_read_supported_codecs Corregir __hci_cmd_sync_sk() para que no devuelva NULL para códigos de operación desconocidos. __hci_cmd_sync_sk() devuelve NULL si un comando devuelve un evento de estado. Sin embargo, también devuelve NULL cuando no existe un código de operación en la tabla hci_cc porque hci_cmd_complete_evt() asume status = skb-&gt;data[0] para códigos de operación desconocidos. Esto lleva a null-ptr-deref en cmd_sync para HCI_OP_READ_LOCAL_CODECS ya que no hay hci_cc para HCI_OP_READ_LOCAL_CODECS, que siempre asume status = skb-&gt;data[0]. KASAN: null-ptr-deref en el rango [0x0000000000000070-0x0000000000000077] CPU: 1 PID: 2000 Comm: kworker/u9:5 No contaminado 6.9.0-ga6bcb805883c-dirty #10 Nombre del hardware: PC estándar QEMU (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Cola de trabajo: hci7 hci_power_on RIP: 0010:hci_read_supported_codecs+0xb9/0x870 net/bluetooth/hci_codec.c:138 Código: 08 48 89 ef e8 b8 c1 8f fd 48 8b 75 00 e9 96 00 00 00 49 89 c6 48 ba 00 00 00 00 00 fc ff df 4c 8d 60 70 4c 89 e3 48 c1 eb 03 &lt;0f&gt; b6 04 13 84 c0 0f 85 82 06 00 00 41 83 3c 24 02 77 0a e8 bf 78 RSP: 0018:ffff888120bafac8 EFLAGS: 00010212 RAX: 000000000000000 RBX: 000000000000000e RCX: ffff8881173f0040 RDX: dffffc0000000000 RSI: ffffffffa58496c0 RDI: ffff88810b9ad1e4 RBP: ffff88810b9ac000 R08: ffffffffa77882a7 R09: 1ffffffff4ef1054 R10: dffffc0000000000 R11: fffffbfff4ef1055 R12: 0000000000000070 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810b9ac000 FS: 0000000000000000(0000) GS:ffff8881f6c00000(0000) knlGS:00000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ddaa3439e CR3: 0000000139764003 CR4: 0000000000770ef0 PKRU: 55555554 Seguimiento de llamadas: hci_read_local_codecs_sync net/bluetooth/hci_sync.c:4546 [en línea] hci_init_stage_sync net/bluetooth/hci_sync.c:3441 [en línea] hci_init4_sync net/bluetooth/hci_sync.c:4706 [en línea] hci_init_sync net/bluetooth/hci_sync.c:4742 [en línea] hci_dev_init_sync net/bluetooth/hci_sync.c:4912 [en línea] hci_dev_open_sync+0x19a9/0x2d30 net/bluetooth/hci_sync.c:4994 hci_dev_do_open net/bluetooth/hci_core.c:483 [en línea] hci_power_on+0x11e/0x560 net/bluetooth/hci_core.c:1015 proceso_uno_trabajo kernel/workqueue.c:3267 [en línea] proceso_trabajos_programados+0x8ef/0x14f0 kernel/workqueue.c:3348 subproceso de trabajo+0x91f/0xe50 kernel/workqueue.c:3429 subproceso de trabajo+0x2cb/0x360 kernel/kthread.c:388 ret_de_bifurcación+0x4d/0x80 arch/x86/kernel/process.c:147 ret_de_bifurcación_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

09 Nov 2024, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-11-09 11:15

Updated : 2025-11-03 23:17

NVD link : CVE-2024-50255

Mitre link : CVE-2024-50255

CVE.ORG link : CVE-2024-50255

JSON object : View

Products Affected

linux

CWE
CWE-476

NULL Pointer Dereference