CVE-2023-0461
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
How to fix
- linux linux_kernel4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.88, 6.0.19, 6.1.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.13.0 ≤ v < 4.14.303, 4.19 ≤ v < 4.19.270, 5.4 ≤ v < 5.4.229, 5.10 ≤ v < 5.10.163, 5.15 ≤ v < 5.15.88, 6.0 ≤ v < 6.0.19, 6.1 ≤ v < 6.1.5, 6.2 | 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.88, 6.0.19, 6.1.5 |
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