Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.9, < 6.1.129 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/022cac1c693add610ae76ede03adf4d9d5a2cf21Patch
- https://git.kernel.org/stable/c/20a3489b396764cc9376e32a9172bee26a89dc3bPatch
- https://git.kernel.org/stable/c/5bb4228c32261d06e4fbece37ec3828bcc005b6bPatch
- https://git.kernel.org/stable/c/6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51ePatch
- https://git.kernel.org/stable/c/6d0ce46a93135d96b7fa075a94a88fe0da8e8773Patch
- https://git.kernel.org/stable/c/7b81425b517accefd46bee854d94954f5c57e019Patch
- https://git.kernel.org/stable/c/c40cb5c03e37552d6eff963187109e2c3f78ef6fPatch
- https://git.kernel.org/stable/c/c7574740be8ce68a57d0aece24987b9be2114c3cPatch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
FAQ
What is CVE-2025-21791?
CVE-2025-21791 is a vulnerability with a CVSS score of 7.8 (HIGH). 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_f...
How severe is CVE-2025-21791?
CVE-2025-21791 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21791?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.