CVE-2025-21791
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS 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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/022cac1c693add610ae76ede03adf4d9d5a2cf21 ↗
Additional information
- NVD record
- 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