logo_clicknbuy.png

CVE-2025-21791 – Linux Kernel RCU Protection Vulnerability in VRF l3mdev_l3_out()

The following table lists the changes that have been made to the
CVE-2025-21791 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 27, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/022cac1c693add610ae76ede03adf4d9d5a2cf21
    Added Reference https://git.kernel.org/stable/c/6d0ce46a93135d96b7fa075a94a88fe0da8e8773
    Added Reference https://git.kernel.org/stable/c/7b81425b517accefd46bee854d94954f5c57e019
    Added Reference https://git.kernel.org/stable/c/c40cb5c03e37552d6eff963187109e2c3f78ef6f
    Added Reference https://git.kernel.org/stable/c/c7574740be8ce68a57d0aece24987b9be2114c3c
Share the Post:

Related Posts