CVE-2025-21791

vrf: use RCU protection in l3mdev_l3_out()

CVSS 7.8 HIGHEPSS 0.2%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 Feb 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

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 https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html