Vulnerability CVE-2024-42285
Published: 2024-08-17

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

RDMA/iwcm: Fix a use-after-free related to destroying CM IDs

iw_conn_req_handler() associates a new struct rdma_id_private (conn_id) with
an existing struct iw_cm_id (cm_id) as follows:

conn_id->cm_id.iw = cm_id;
cm_id->context = conn_id;
cm_id->cm_handler = cma_iw_handler;

rdma_destroy_id() frees both the cm_id and the struct rdma_id_private. Make
sure that cm_work_handler() does not trigger a use-after-free by only
freeing of the struct rdma_id_private after all pending work has finished.

 References:
https://git.kernel.org/stable/c/dc8074b8901caabb97c2d353abd6b4e7fa5a59a5
https://git.kernel.org/stable/c/ff5bbbdee08287d75d72e65b72a2b76d9637892a
https://git.kernel.org/stable/c/ee39384ee787e86e9db4efb843818ef0ea9cb8ae
https://git.kernel.org/stable/c/aee2424246f9f1dadc33faa78990c1e2eb7826e4
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