CVE-2023-0461

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

• linux linux kernel (>= 4.13.0 < 4.14.303) • linux linux kernel (>= 4.19 < 4.19.270) • linux linux kernel (>= 5.4 < 5.4.229) • linux linux kernel (>= 5.10 < 5.10.163) • linux linux kernel (>= 5.15 < 5.15.88) • linux linux kernel (>= 6.0 < 6.0.19) • linux linux kernel (>= 6.1 < 6.1.5) • linux linux kernel 6.2