CVE-2025-37756

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: tls: explicitly disallow disconnect<br /> <br /> syzbot discovered that it can disconnect a TLS socket and then<br /> run into all sort of unexpected corner cases. I have a vague<br /> recollection of Eric pointing this out to us a long time ago.<br /> Supporting disconnect is really hard, for one thing if offload<br /> is enabled we&amp;#39;d need to wait for all packets to be _acked_.<br /> Disconnect is not commonly used, disallow it.<br /> <br /> The immediate problem syzbot run into is the warning in the strp,<br /> but that&amp;#39;s just the easiest bug to trigger:<br /> <br /> WARNING: CPU: 0 PID: 5834 at net/tls/tls_strp.c:486 tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486<br /> RIP: 0010:tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486<br /> Call Trace:<br /> <br /> tls_rx_rec_wait+0x280/0xa60 net/tls/tls_sw.c:1363<br /> tls_sw_recvmsg+0x85c/0x1c30 net/tls/tls_sw.c:2043<br /> inet6_recvmsg+0x2c9/0x730 net/ipv6/af_inet6.c:678<br /> sock_recvmsg_nosec net/socket.c:1023 [inline]<br /> sock_recvmsg+0x109/0x280 net/socket.c:1045<br /> __sys_recvfrom+0x202/0x380 net/socket.c:2237