CVE-2026-93803

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

wifi: libipw: fix key index receive bound checks

libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in

both the software-decrypt key selection path and the hardware-decrypted

IV/ICV strip path. In both places the existing guard only checks

skb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the

byte at hdrlen + 3.

Require hdrlen + 4 bytes before reading that item in both paths. This is

a local source-boundary check only; it does not change the key index

semantics.