Security Advisory

CVE-2025-40149

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-11-12 10:23:27

Last updated 2026-05-11 21:43:41

Assigner Linux

State PUBLISHED

Description

In the Linux kernel, the following vulnerability has been resolved: tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock(). get_netdev_for_sock() is called during setsockopt(), so not under RCU. Using sk_dst_get(sk)->dev could trigger UAF. Lets use __sk_dst_get() and dst_dev_rcu(). Note that the only ->ndo_sk_get_lower_dev() user is bond_sk_get_lower_dev(), which uses RCU.

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