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.

Classification

CVE ID: CVE-2023-52513

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

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

Timeline