CVE-2026-68119 tcp: initialize standalone TCP-AO response padding

In the Linux kernel, the following vulnerability has been resolved: tcp: initialize standalone TCP-AO response padding tcpv4sendack and tcpv6sendresponse construct standalone TCP responses with TCP-AO options. The option length carries the actual MAC length, but the TCP header length includes the...

CVE-2026-68119

The CVE-2026-68119 issue concerns the Linux kernel TCP-AO implementation: when constructing standalone TCP responses with TCP-AO options, the TCP header padding is not fully initialized if the MAC length is not four-byte aligned. The function tcp_ao_hash_hdr() writes only the MAC, leaving 1–3 pad...