CVE-2026-64327

The CVE-2026-64327 in the Linux kernel affects usb: gadget: f_fs. The vulnerability occurred because epfile->in was initialized only in ffs_func_eps_enable(), which runs after USB host connection. Early userspace IOCTLs could observe epfile->in as 0, causing incorrect DMA directions. The fi...

CVE-2026-64327 usb: gadget: f_fs: Initialize epfile->in early to fix endpoint direction checks

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Initialize epfile-in early to fix endpoint direction checks When parsing endpoint descriptors, ffsdatagotdescs generates the epsaddrmap which contains the endpoint direction. However, epfile-in was previously on...