CVE-2025-21715 net: davicom: fix UAF in dm9000_drv_remove
A use-after-free vulnerability in the Linux kernel's Davicom network driver allows attackers to potentially execute code or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-21715?
CVE-2025-21715 is a high-severity use after free vulnerability in Linux kernel, published on 27 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: davicom: fix UAF in dm9000_drv_remove
dm is netdev private data and it cannot be used after free_netdev() call. Using dm after free_netdev() can cause UAF bug. Fix it by moving free_netdev() at the end of the function.
This is similar to the issue fixed in commit ad297cd2db89 ("net: qcom/emac: fix UAF in emac_remove").
This bug is detected by our static analysis tool.
Weakness: CWE-416
Which versions are affected by CVE-2025-21715?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-21715?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-21715 being exploited?
There is no known exploitation of CVE-2025-21715 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-21715, DEBIAN-CVE-2025-21715, GHSA-cmvg-6vcw-642h, ROOT-OS-UBUNTU-2404-CVE-2025-21715, UBUNTU-CVE-2025-21715.