In the Linux kernel, the following vulnerability has been resolved:

net: tls: explicitly disallow disconnect

syzbot discovered that it can disconnect a TLS socket and then
run into all sort of unexpected corner cases. I have a vague
recollection of Eric pointing this out to us a long time ago.
Supporting disconnect is really hard, for one thing if offload
is enabled we'd need to wait for all packets to be _acked_.
Disconnect is not commonly used, disallow it.

The immediate problem syzbot run into is the warning in the strp,
but that's just the easiest bug to trigger:

  WARNING: CPU: 0 PID: 5834 at net/tls/tls_strp.c:486 tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486
  RIP: 0010:tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486
  Call Trace:
   <TASK>
   tls_rx_rec_wait+0x280/0xa60 net/tls/tls_sw.c:1363
   tls_sw_recvmsg+0x85c/0x1c30 net/tls/tls_sw.c:2043
   inet6_recvmsg+0x2c9/0x730 net/ipv6/af_inet6.c:678
   sock_recvmsg_nosec net/socket.c:1023 [inline]
   sock_recvmsg+0x109/0x280 net/socket.c:1045
   __sys_recvfrom+0x202/0x380 net/socket.c:2237

https://git.kernel.org/stable/c/2bcad8fefcecdd5f005d8c550b25d703c063c34a

https://git.kernel.org/stable/c/5071a1e606b30c0c11278d3c6620cd6a24724cf6

https://git.kernel.org/stable/c/8513411ec321942bd3cfed53d5bb700665c67d86

https://git.kernel.org/stable/c/9fcbca0f801580cbb583e9cb274e2c7fbe766ca6

https://git.kernel.org/stable/c/c665bef891e8972e1d3ce5bbc0d42a373346a2c3

https://git.kernel.org/stable/c/f3ce4d3f874ab7919edca364c147ac735f9f1d04