CVE-2026-74679

Summary

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

usb: gadget: f_ncm: Use unsigned int for ndp_index

The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned.

A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index).

Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < 9c8c6825a750fcd3efbe922847ca70ccd5a66857affected
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < a1c0deeba4a46481543d6b09c665f758c54c3a1aaffected
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < d13f650a3485b58c124b3cda45597e8002c9c833affected
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < 11413d7ed42174b8f5d8d0b6a25d10dc88239b21affected
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < 5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3affected
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < d328fdc607fa1bb668ad512e1c918a120f78f337affected
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < fc9e54e22845c4da29588ca0986cb7c795b5a262affected
LinuxLinux370af734dfaf8336b496b386e194648e097e248a < 6b1c8a9403a26cb0fed7a648916c74dc236da591affected
LinuxLinux3.17affected
LinuxLinux0 < 3.17unaffected
LinuxLinux5.10.265 <= 5.10.*unaffected
LinuxLinux5.15.216 <= 5.15.*unaffected
LinuxLinux6.1.183 <= 6.1.*unaffected
LinuxLinux6.6.152 <= 6.6.*unaffected
LinuxLinux6.12.104 <= 6.12.*unaffected
LinuxLinux6.18.45 <= 6.18.*unaffected
LinuxLinux7.1.9 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References