CVE-2022-49686

EPSS 0.09%
Veröffentlicht 26.02.2025 07:01:43
Zuletzt bearbeitet 24.10.2025 15:51:29
Quelle 416baaa9-dc9f-4396-8d5f-8c081f
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usb: gadget: uvc: fix list double add in uvcg_video_pump

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

usb: gadget: uvc: fix list double add in uvcg_video_pump

A panic can occur if the endpoint becomes disabled and the
uvcg_video_pump adds the request back to the req_free list after it has
already been queued to the endpoint. The endpoint complete will add the
request back to the req_free list. Invalidate the local request handle
once it's been queued.

<6>[  246.796704][T13726] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0)
<3>[  246.797078][   T26] list_add double add: new=ffffff878bee5c40, prev=ffffff878bee5c40, next=ffffff878b0f0a90.
<6>[  246.797213][   T26] ------------[ cut here ]------------
<2>[  246.797224][   T26] kernel BUG at lib/list_debug.c:31!
<6>[  246.807073][   T26] Call trace:
<6>[  246.807180][   T26]  uvcg_video_pump+0x364/0x38c
<6>[  246.807366][   T26]  process_one_work+0x2a4/0x544
<6>[  246.807394][   T26]  worker_thread+0x350/0x784
<6>[  246.807442][   T26]  kthread+0x2ac/0x320