CVE-2025-71112 net: hns3: add VLAN id validation before using
A missing VLAN ID validation in the Linux kernel hns3 driver allows out-of-bounds memory access, potentially leading to code execution or system crashes.
- 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-2025-71112?
CVE-2025-71112 is a high-severity memory corruption vulnerability in Linux kernel, published on 14 Jan 2026. 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: hns3: add VLAN id validation before using
Currently, the VLAN id may be used without validation when receive a VLAN configuration mailbox from VF. The length of vlan_del_fail_bmap is BITS_TO_LONGS(VLAN_N_VID). It may cause out-of-bounds memory access once the VLAN id is bigger than or equal to VLAN_N_VID.
Therefore, VLAN id needs to be checked to ensure it is within the range of VLAN_N_VID.
Which versions are affected by CVE-2025-71112?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-71112?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-71112 being exploited?
There is no known exploitation of CVE-2025-71112 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-71112, DEBIAN-CVE-2025-71112, GHSA-8jw9-cqx6-7g57, ROOT-OS-DEBIAN-11-CVE-2025-71112, ROOT-OS-DEBIAN-12-CVE-2025-71112, ROOT-OS-DEBIAN-13-CVE-2025-71112 and 3 more.