CVE-2026-74679 in Linux
Resumen
por MITRE • 2026-08-22
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.
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