CVE-2023-54129 octeontx2-af: Add validation for lmac type
A missing validation in the octeontx2-af driver causes a kernel panic when firmware reports an invalid lmac_type_id, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-54129?
CVE-2023-54129 is a high-severity vulnerability in Linux, published on 24 Dec 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:
octeontx2-af: Add validation for lmac type
Upon physical link change, firmware reports to the kernel about the change along with the details like speed, lmac_type_id, etc. Kernel derives lmac_type based on lmac_type_id received from firmware.
In a few scenarios, firmware returns an invalid lmac_type_id, which is resulting in below kernel panic. This patch adds the missing validation of the lmac_type_id field.
Internal error: Oops: 96000005 [#1] PREEMPT SMP [ 35.321595] Modules linked in: [ 35.328982] CPU: 0 PID: 31 Comm: kworker/0:1 Not tainted 5.4.210-g2e3169d8e1bc-dirty #17 [ 35.337014] Hardware name: Marvell CN103XX board (DT) [ 35.344297] Workqueue: events work_for_cpu_fn [ 35.352730] pstate: 40400089 (nZcv daIf +PAN -UAO) [ 35.360267] pc : strncpy+0x10/0x30 [ 35.366595] lr : cgx_link_change_handler+0x90/0x180
Which versions are affected by CVE-2023-54129?
How do I fix CVE-2023-54129?
Apply the vendor's patch.
Is CVE-2023-54129 being exploited?
There is no known exploitation of CVE-2023-54129 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54129, DEBIAN-CVE-2023-54129, GHSA-646g-pwv5-gp8f, ROOT-OS-DEBIAN-11-CVE-2023-54129, ROOT-OS-UBUNTU-2204-CVE-2023-54129, UBUNTU-CVE-2023-54129.