Detections
Analytics
CVE-2026-89733
high
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind() In uvc_function_bind() error path, we use usb_ep_free_request which uses uvc->control_req but does not set it to NULL afterwards. Thus, uvc->control_req is a dangling pointer causing a UAF. Also we do not set the uvc->control_buf pointer to NULL after freeing it, which is another dangling pointer. Fix it by setting uvc->control_req to NULL after we run usb_ep_free_request() and uvc->control_buf to NULL after kfree. Do the same for uvc_function_unbind().
References
https://git.kernel.org/stable/c/ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2
https://git.kernel.org/stable/c/bec7708eb3b5295d12e931db24381b7c94c72953
https://git.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc
https://git.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cb
https://git.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbb
https://git.kernel.org/stable/c/85dd5e8bd6776d02854f2847d83429f1f712e99c
https://git.kernel.org/stable/c/502a7f5b79b7ba751988789e982924f8f496129f
https://git.kernel.org/stable/c/38f822ddce9355893d734279a26ddec45182197e