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CVE-2025-21742

Description

In the Linux kernel, the following vulnerability has been resolved:usbnet: ipheth: use static NDP16 location in URBOriginal code allowed for the start of NDP16 to be anywhere within theURB based on the `wNdpIndex` value in NTH16. Only the start position ofNDP16 was checked, so it was possible for even the fixed-length partof NDP16 to extend past the end of URB, leading to an out-of-boundsread.On iOS devices, the NDP16 header always directly follows NTH16. Rely onand check for this specific format.This, along with NCM-specific minimal URB length check that alreadyexists, will ensure that the fixed-length part of NDP16 plus a setamount of DPEs fit within the URB.Note that this commit alone does not fully address the OoB read.The limit on the amount of DPEs needs to be enforced separately.

POC

Reference

- https://git.kernel.org/stable/c/86586dcb75cb8fd062a518aca8ee667938b91efb

Github

- https://github.com/fkie-cad/nvd-json-data-feeds