CVE-2026-72139

The CVE concerns a Linux kernel race where per-socket authentication data (md5sig/md5sig_key) could be freed before an RCU grace period elapses during tcp_connect. In the vulnerable path, two branches (needs_md5 and needs_ao) free the md5sig_info or its keys while a socket is in TCP_SYN_SENT, ris...

CVE-2026-72139: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: tcp: defer md5siginfo kfree past RCU grace period in tcpconnect The md5+ao reconciliation in tcpconnect net/ipv4/tcpoutput.c has two symmetric branches: if needsmd5 tcpaodestroysocksk, false; else if needsao tcpclearmd5listsk;...