| Description: |
There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS?or CONFIG_XFRM_ESPINTCP?has to be configured, but the operation does not require any privilege.
There is a use-after-free bug of icsk_ulp_data?of a struct inet_connection_sock.
When CONFIG_TLS?is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.
The setsockopt?TCP_ULP?operation does not require any privilege.
We recommend upgrading past commit?2c02d41d71f90a5168391b6a5f2954112ba2307c
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