A vulnerability has been found in Linux Kernel up to 7.0.12 and classified as critical . This issue affects the function lowpan_iphc_mcast_ctx_addr_compress of the component 6lowpan . The manipulation of the argument s6_addr leads to off-by-one. This vulnerability is uniquely identified as CVE-2026-53263 . The attack can only be initiated within the local network. No exploit exists. The affected component should be upgraded.