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
- CVSS v3.1
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.65% chance of exploitation in the next 30 days, 49th percentile
- Published
- 2023-02-28
- Updated
- 2025-02-13
Proof-of-concept exploits (1)
- b1nhack/CVE-2023-04610★ · 2025-08-03