Vulnerabilities > CVE-2025-21791 - Use After Free vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
In the Linux kernel, the following vulnerability has been resolved: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/022cac1c693add610ae76ede03adf4d9d5a2cf21
- https://git.kernel.org/stable/c/20a3489b396764cc9376e32a9172bee26a89dc3b
- https://git.kernel.org/stable/c/5bb4228c32261d06e4fbece37ec3828bcc005b6b
- https://git.kernel.org/stable/c/6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e
- https://git.kernel.org/stable/c/6d0ce46a93135d96b7fa075a94a88fe0da8e8773
- https://git.kernel.org/stable/c/7b81425b517accefd46bee854d94954f5c57e019
- https://git.kernel.org/stable/c/c40cb5c03e37552d6eff963187109e2c3f78ef6f
- https://git.kernel.org/stable/c/c7574740be8ce68a57d0aece24987b9be2114c3c