CVE-2022-49470
Estado: ModificadaAlta (8.8)—
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event
We should not access skb buffer data anymore after hci_recv_frame was called.
Detalles técnicos trazas, registros y código del informe original
[ 39.634809] BUG: KASAN: use-after-free in btmtksdio_recv_event+0x1b0
[ 39.634855] Read of size 1 at addr ffffff80cf28a60d by task kworker
[ 39.634962] Call trace:
[ 39.634974] dump_backtrace+0x0/0x3b8
[ 39.634999] show_stack+0x20/0x2c
[ 39.635016] dump_stack_lvl+0x60/0x78
[ 39.635040] print_address_description+0x70/0x2f0
[ 39.635062] kasan_report+0x154/0x194
[ 39.635079] __asan_report_load1_noabort+0x44/0x50
[ 39.635099] btmtksdio_recv_event+0x1b0/0x1c4
[ 39.635129] btmtksdio_txrx_work+0x6cc/0xac4
[ 39.635157] process_one_work+0x560/0xc5c
[ 39.635177] worker_thread+0x7ec/0xcc0
[ 39.635195] kthread+0x2d0/0x3d0
[ 39.635215] ret_from_fork+0x10/0x20
[ 39.635247] Allocated by task 0:
[ 39.635260] (stack is not available)
[ 39.635281] Freed by task 2392:
[ 39.635295] kasan_save_stack+0x38/0x68
[ 39.635319] kasan_set_track+0x28/0x3c
[ 39.635338] kasan_set_free_info+0x28/0x4c
[ 39.635357] ____kasan_slab_free+0x104/0x150
[ 39.635374] __kasan_slab_free+0x18/0x28
[ 39.635391] slab_free_freelist_hook+0x114/0x248
[ 39.635410] kfree+0xf8/0x2b4
[ 39.635427] skb_free_head+0x58/0x98
[ 39.635447] skb_release_data+0x2f4/0x410
[ 39.635464] skb_release_all+0x50/0x60
[ 39.635481] kfree_skb+0xc8/0x25c
[ 39.635498] hci_event_packet+0x894/0xca4 [bluetooth]
[ 39.635721] hci_rx_work+0x1c8/0x68c [bluetooth]
[ 39.635925] process_one_work+0x560/0xc5c
[ 39.635951] worker_thread+0x7ec/0xcc0
[ 39.635970] kthread+0x2d0/0x3d0
[ 39.635990] ret_from_fork+0x10/0x20
[ 39.636021] The buggy address belongs to the object at ffffff80cf28a600
which belongs to the cache kmalloc-512 of size 512
[ 39.636039] The buggy address is located 13 bytes inside of
512-byte region [ffffff80cf28a600, ffffff80cf28a800)CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.31%
- Percentil entre todas las CVEs puntuadas: 22
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement35 % - Impacto principal
T1059Command and Scripting Interpreterexecution25 %
CWE-416 (use-after-free) en driver Bluetooth local; vector AV:A indica red adyacente. Explotación potencial remota via Bluetooth. Impacto limitado: crash/DoS más probable que ejecución de código arbitrario.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-416
Referencias
JSON original (NVD)
Mostrar
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],
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{
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"version": "5.17.14",
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{
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"version": "5.18.3",
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},
{
"status": "unaffected",
"version": "5.19",
"versionType": "original_commit_for_fix",
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}
],
"programFiles": [
"drivers/bluetooth/btmtksdio.c"
],
"defaultStatus": "affected"
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"published": "2025-02-26T07:01:23.240",
"references": [
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"tags": [
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"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
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"value": "CWE-416"
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event\n\nWe should not access skb buffer data anymore after hci_recv_frame was\ncalled.\n\n[ 39.634809] BUG: KASAN: use-after-free in btmtksdio_recv_event+0x1b0\n[ 39.634855] Read of size 1 at addr ffffff80cf28a60d by task kworker\n[ 39.634962] Call trace:\n[ 39.634974] dump_backtrace+0x0/0x3b8\n[ 39.634999] show_stack+0x20/0x2c\n[ 39.635016] dump_stack_lvl+0x60/0x78\n[ 39.635040] print_address_description+0x70/0x2f0\n[ 39.635062] kasan_report+0x154/0x194\n[ 39.635079] __asan_report_load1_noabort+0x44/0x50\n[ 39.635099] btmtksdio_recv_event+0x1b0/0x1c4\n[ 39.635129] btmtksdio_txrx_work+0x6cc/0xac4\n[ 39.635157] process_one_work+0x560/0xc5c\n[ 39.635177] worker_thread+0x7ec/0xcc0\n[ 39.635195] kthread+0x2d0/0x3d0\n[ 39.635215] ret_from_fork+0x10/0x20\n[ 39.635247] Allocated by task 0:\n[ 39.635260] (stack is not available)\n[ 39.635281] Freed by task 2392:\n[ 39.635295] kasan_save_stack+0x38/0x68\n[ 39.635319] kasan_set_track+0x28/0x3c\n[ 39.635338] kasan_set_free_info+0x28/0x4c\n[ 39.635357] ____kasan_slab_free+0x104/0x150\n[ 39.635374] __kasan_slab_free+0x18/0x28\n[ 39.635391] slab_free_freelist_hook+0x114/0x248\n[ 39.635410] kfree+0xf8/0x2b4\n[ 39.635427] skb_free_head+0x58/0x98\n[ 39.635447] skb_release_data+0x2f4/0x410\n[ 39.635464] skb_release_all+0x50/0x60\n[ 39.635481] kfree_skb+0xc8/0x25c\n[ 39.635498] hci_event_packet+0x894/0xca4 [bluetooth]\n[ 39.635721] hci_rx_work+0x1c8/0x68c [bluetooth]\n[ 39.635925] process_one_work+0x560/0xc5c\n[ 39.635951] worker_thread+0x7ec/0xcc0\n[ 39.635970] kthread+0x2d0/0x3d0\n[ 39.635990] ret_from_fork+0x10/0x20\n[ 39.636021] The buggy address belongs to the object at ffffff80cf28a600\n which belongs to the cache kmalloc-512 of size 512\n[ 39.636039] The buggy address is located 13 bytes inside of\n 512-byte region [ffffff80cf28a600, ffffff80cf28a800)"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: btmtksdio: se corrige el use-after-free en btmtksdio_recv_event Ya no deberíamos acceder a los datos del búfer skb después de llamar a hci_recv_frame. [ 39.634809] ERROR: KASAN: use-after-free in btmtksdio_recv_event+0x1b0 [ 39.634855] Read of size 1 at addr ffffff80cf28a60d by task kworker [ 39.634962] Call trace: [ 39.634974] dump_backtrace+0x0/0x3b8 [ 39.634999] show_stack+0x20/0x2c [ 39.635016] dump_stack_lvl+0x60/0x78 [ 39.635040] print_address_description+0x70/0x2f0 [ 39.635062] kasan_report+0x154/0x194 [ 39.635079] __asan_report_load1_noabort+0x44/0x50 [ 39.635099] btmtksdio_recv_event+0x1b0/0x1c4 [ 39.635129] btmtksdio_txrx_work+0x6cc/0xac4 [ 39.635157] process_one_work+0x560/0xc5c [ 39.635177] worker_thread+0x7ec/0xcc0 [ 39.635195] kthread+0x2d0/0x3d0 [ 39.635215] ret_from_fork+0x10/0x20 [ 39.635247] Allocated by task 0: [ 39.635260] (stack is not available) [ 39.635281] Freed by task 2392: [ 39.635295] kasan_save_stack+0x38/0x68 [ 39.635319] kasan_set_track+0x28/0x3c [ 39.635338] kasan_set_free_info+0x28/0x4c [ 39.635357] ____kasan_slab_free+0x104/0x150 [ 39.635374] __kasan_slab_free+0x18/0x28 [ 39.635391] slab_free_freelist_hook+0x114/0x248 [ 39.635410] kfree+0xf8/0x2b4 [ 39.635427] skb_free_head+0x58/0x98 [ 39.635447] skb_release_data+0x2f4/0x410 [ 39.635464] skb_release_all+0x50/0x60 [ 39.635481] kfree_skb+0xc8/0x25c [ 39.635498] hci_event_packet+0x894/0xca4 [bluetooth] [ 39.635721] hci_rx_work+0x1c8/0x68c [bluetooth] [ 39.635925] process_one_work+0x560/0xc5c [ 39.635951] worker_thread+0x7ec/0xcc0 [ 39.635970] kthread+0x2d0/0x3d0 [ 39.635990] ret_from_fork+0x10/0x20 [ 39.636021] The buggy address belongs to the object at ffffff80cf28a600 which belongs to the cache kmalloc-512 of size 512 [ 39.636039] The buggy address is located 13 bytes inside of 512-byte region [ffffff80cf28a600, ffffff80cf28a800) "
}
],
"lastModified": "2026-08-04T10:17:48.903",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2A62F037-652E-4FE9-83E5-34D00905DD46",
"versionEndExcluding": "5.15.54",
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{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"operator": "OR"
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}