CVE-2023-52513 Information

Description

In the Linux kernel the following vulnerability has been resolved:

RDMA/siw: Fix connection failure handling

In case immediate MPA request processing fails the newly created endpoint unlinks the listening endpoint and is ready to be dropped. This special case was not handled correctly by the code handling the later TCP socket close causing a NULL dereference crash in siw_cm_work_handler() when dereferencing a NULL listener. We now also cancel the useless MPA timeout if immediate MPA request processing fails.

This patch furthermore simplifies MPA processing in general: Scheduling a useless TCP socket read in sk_data_ready() upcall is now surpressed if the socket is already moved out of TCP_ESTABLISHED state.

Reference

https://git.kernel.org/stable/c/6e26812e289b374c17677d238164a5a8f5770594 https://git.kernel.org/stable/c/0d520cdb0cd095eac5d00078dfd318408c9b5eed https://git.kernel.org/stable/c/81b7bf367eea795d259d0261710c6a89f548844d https://git.kernel.org/stable/c/5cf38e638e5d01b68f9133968a85e8b3fd1ecf2f https://git.kernel.org/stable/c/eeafc50a77f6a783c2c44e7ec3674a7b693e06f8 https://git.kernel.org/stable/c/53a3f777049771496f791504e7dc8ef017cba590