CVE-2022-49235

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

ath9k_htc: fix uninit value bugs

Syzbot reported 2 KMSAN bugs in ath9k. All of them are caused by missing field initialization.

In htc_connect_service() svc_meta_len and pad are not initialized. Based on code it looks like in current skb there is no service data, so simply initialize svc_meta_len to 0.

htc_issue_send() does not initialize htc_frame_hdr::control array. Based on firmware code, it will initialize it by itself, so simply zero whole array to make KMSAN happy

Fail logs:

Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [inline] htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258 ...

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Bytes 4-7 of 18 are uninitialized Memory access of size 18 starts at ffff888027377e00

Bytes 16-17 of 18 are uninitialized Memory access of size 18 starts at ffff888027377e00

Detalles técnicos trazas, registros y código del informe original

BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline]
 hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479
 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline]
 htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275
...

BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline]
 hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479
 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline]
 htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275
...

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.28%
Percentil entre todas las CVEs puntuadas: 18
Fecha de la puntuación: 6/10/2026

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-908
CWE-908

Referencias

JSON original (NVD)

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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nath9k_htc: fix uninit value bugs\n\nSyzbot reported 2 KMSAN bugs in ath9k. All of them are caused by missing\nfield initialization.\n\nIn htc_connect_service() svc_meta_len and pad are not initialized. Based\non code it looks like in current skb there is no service data, so simply\ninitialize svc_meta_len to 0.\n\nhtc_issue_send() does not initialize htc_frame_hdr::control array. Based\non firmware code, it will initialize it by itself, so simply zero whole\narray to make KMSAN happy\n\nFail logs:\n\nBUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430\n usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430\n hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline]\n hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479\n htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline]\n htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275\n...\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:524 [inline]\n slab_alloc_node mm/slub.c:3251 [inline]\n __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974\n kmalloc_reserve net/core/skbuff.c:354 [inline]\n __alloc_skb+0x545/0xf90 net/core/skbuff.c:426\n alloc_skb include/linux/skbuff.h:1126 [inline]\n htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258\n...\n\nBytes 4-7 of 18 are uninitialized\nMemory access of size 18 starts at ffff888027377e00\n\nBUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430\n usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430\n hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline]\n hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479\n htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline]\n htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275\n...\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:524 [inline]\n slab_alloc_node mm/slub.c:3251 [inline]\n __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974\n kmalloc_reserve net/core/skbuff.c:354 [inline]\n __alloc_skb+0x545/0xf90 net/core/skbuff.c:426\n alloc_skb include/linux/skbuff.h:1126 [inline]\n htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258\n...\n\nBytes 16-17 of 18 are uninitialized\nMemory access of size 18 starts at ffff888027377e00"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ath9k_htc: corregir errores de valores no inicializados Syzbot informó de 2 errores de KMSAN en ath9k. Todos ellos son causados por la falta de inicialización de campos. En htc_connect_service(), svc_meta_len y pad no se inicializan. Según el código, parece que en el skb actual no hay datos de servicio, por lo que simplemente inicialice svc_meta_len a 0. htc_issue_send() no inicializa la matriz htc_frame_hdr::control. Basado en el código del firmware, lo inicializará por sí mismo, así que simplemente ponga a cero toda la matriz para que KMSAN esté contento Registros de errores: ERROR: KMSAN: kernel-usb-infoleak en usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [en línea] hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [en línea] htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275 ... Uninit se creó en: slab_post_alloc_hook mm/slab.h:524 [en línea] slab_alloc_node mm/slub.c:3251 [en línea] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [en línea] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [en línea] htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258 ... Los bytes 4-7 de 18 no están inicializados El acceso a la memoria de tamaño 18 comienza en ffff888027377e00 ERROR: KMSAN: kernel-usb-infoleak en usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [en línea] hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [en línea] htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275 ... Uninit se creó en: slab_post_alloc_hook mm/slab.h:524 [en línea] slab_alloc_node mm/slub.c:3251 [en línea] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [en línea] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [en línea] htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258 ... Los bytes 16-17 de 18 no están inicializados. El acceso a la memoria de tamaño 18 comienza en ffff888027377e00"
    }
  ],
  "lastModified": "2026-06-17T05:17:27.973",
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