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Acknowledged

LIN1021-14414 : Security Advisory - linux - CVE-2025-21791

Created: Feb 27, 2025 Updated: Jun 17, 2025

Found In Version: 10.21.20.1

Severity: Standard

Applicable for: Wind River Linux LTS 21

Component/s: Kernel

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.

CREATE(Triage):(User=admin) CVE-2025-21791 (https://nvd.nist.gov/vuln/detail/CVE-2025-21791)