In the Linux kernel, the following vulnerability has been resolved: USB: gadget: ffs: fix mm lifetime handling io_data stores a pointer to the submitting task's mm_struct, but does not currently hold a reference to it while async requests are pending. This can result in a use-after-free if the task exits before completion handling finishes. Take a reference with mmgrab() when queuing the read request and release it with mmdrop() on request completion.
https://git.kernel.org/stable/c/f3d31484b3f26d63c09e5569ebfaa1079a17f171
https://git.kernel.org/stable/c/7411de0ce3b45286de1de82526795658ea6eacb0
https://git.kernel.org/stable/c/5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8