CVE-2025-40314

Summary

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

usb: cdns3: gadget: Use-after-free during failed initialization and exit of cdnsp gadget

In the __cdnsp_gadget_init() and cdnsp_gadget_exit() functions, the gadget structure (pdev->gadget) was freed before its endpoints. The endpoints are linked via the ep_list in the gadget structure. Freeing the gadget first leaves dangling pointers in the endpoint list. When the endpoints are subsequently freed, this results in a use-after-free.

Fix: By separating the usb_del_gadget_udc() operation into distinct "del" and "put" steps, cdnsp_gadget_free_endpoints() can be executed prior to the final release of the gadget structure with usb_put_gadget().

A patch similar to bb9c74a5bd14("usb: dwc3: gadget: Free gadget structure only after freeing endpoints").

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8bc1901ca7b07d864fca11461b3875b31f949765 < 0cf9a50af91fbdac3849f8d950e883a3eaa3eceaaffected
LinuxLinux8bc1901ca7b07d864fca11461b3875b31f949765 < 37158ce6ba964b62d1e3eebd11f03c6900a52dd1affected
LinuxLinux8bc1901ca7b07d864fca11461b3875b31f949765 < ea37884097a0931abb8e11e40eacfb25e9fdb5e9affected
LinuxLinux8bc1901ca7b07d864fca11461b3875b31f949765 < 9c52f01429c377a2d32cafc977465f37b5384f77affected
LinuxLinux8bc1901ca7b07d864fca11461b3875b31f949765 < fdf573c517627a96f5040f988e9b21267806be5caffected
LinuxLinux8bc1901ca7b07d864fca11461b3875b31f949765 < 87c5ff5615dc0a37167e8faf3adeeddc6f1344a3affected
LinuxLinux5.3affected
LinuxLinux0 < 5.3unaffected
LinuxLinux5.15.197 <= 5.15.*unaffected
LinuxLinux6.1.159 <= 6.1.*unaffected
LinuxLinux6.6.117 <= 6.6.*unaffected
LinuxLinux6.12.58 <= 6.12.*unaffected
LinuxLinux6.17.8 <= 6.17.*unaffected
LinuxLinux6.18 <= *unaffected

Weaknesses

References