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

sctp: diag: reject stale associations in dump_one path

The SCTP exact sock_diag lookup can hold a transport reference, block on
lock_sock(sk), and then resume after sctp_association_free() has marked
the association dead and freed its bind address list.

When that happens, inet_assoc_attr_size() and
inet_diag_msg_sctpasoc_fill() can still dereference association state
that is no longer valid for reporting. In particular,
inet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a
real sctp_sockaddr_entry and trigger an out-of-bounds read from
unrelated association memory.

Reject the association after taking the socket lock if it has been
reaped or detached from the endpoint, and report the lookup as stale.
This keeps the exact dump-one path from formatting torn association
state.

https://git.kernel.org/stable/c/480f754580b5686b928977d16a59f20cef83ff01

https://git.kernel.org/stable/c/5425de8bd6e9fe5bd67d158e3348171ae7510117

https://git.kernel.org/stable/c/5eba3e48d78edd7551b992cb7ba687019b3a78da

https://git.kernel.org/stable/c/6657af827e21883ae90693e42e7f59a6aab690b5

https://git.kernel.org/stable/c/78c4f964b2f94e405721c093773f6250e1e676b2

https://git.kernel.org/stable/c/b2be72d401833194917e44fbd8d8144bb4f2db16

https://git.kernel.org/stable/c/e97c2a535e23ed0fdd2660993fb3f10d9535c9bc

https://git.kernel.org/stable/c/f5af203dec6e0e7a6090fcc2130e9f3901bfc84d

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