CVE-2024-56663 is a high-severity vulnerability in the Linux kernel's nl80211 wireless subsystem. It involves an off-by-one error in the validation of the NL80211_ATTR_MLO_LINK_ID attribute, which can lead to a wild memory access and kernel crash. The flaw arises because the maximum allowed value for this attribute was incorrectly set, causing out-of-bounds memory reads. This issue has been fixed by correcting the attribute range validation to use IEEE80211_MLD_MAX_NUM_LINKS - 1 as the maximum value.