An out-of-bounds memory access flaw was found in USBVision USB Camera Driver in usbvision_probe() function in drivers/media/usb/usbvision/usbvision-video.c. The driver assumes that the interfaces numbers of the USB device are always in 0,1,2,3... order. By using a specially crafted USB device which advertises out-of-order number on one of its interfaces an unprivileged user with a physical access can trigger a kernel NULL pointer dereference causing the system to freeze.
Red Hat would like to thank Ralf Spenneberg of OpenSource Security for reporting this issue.
Disclosure post: http://seclists.org/bugtraq/2015/Oct/35
Proposed patch: http://git.linuxtv.org/cgit.cgi/media_tree.git/commit/?id=fa52bd506f274b7619955917abfde355e3d19ffe
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1270160]
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2.
This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
kernel-4.2.7-300.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
kernel-4.2.7-200.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.