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

Affected products

Alt Linux, Almalinux, Astra Linux, Centos, Linux Kernel, Linuxmint, Red Hat, Suse

Linux Linux Kernel

< 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.88, 6.0.19, 6.1.5, 6.2

CVSS 3.1

7.8 HIGH

EPSS

0.7% (49th percentile)

Weakness

CWE-416

NVD status

Modified

Published

2023-02-28

Attack patterns

CAPEC-233