CVE-2026-89872 media: v4l2-fwnode: Fix fwnode leak in v4l2_fwnode_parse_link
A memory leak in the Linux kernel's V4L2 firmware node parser allows local attackers to cause resource exhaustion and 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-2026-89872?
CVE-2026-89872 is a memory corruption vulnerability in Linux, published on 16 Sep 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:
media: v4l2-fwnode: Fix fwnode leak in v4l2_fwnode_parse_link
In v4l2_fwnode_parse_link(), the remote endpoint fwnode reference is acquired using fwnode_graph_get_remote_endpoint(). This reference is properly released in the error paths, but it is leaked on the success path.
Add the missing fwnode_handle_put() before returning 0 to prevent the reference leak.
[Sakari Ailus: Fix subject prefix and coding style a little.]
Which versions are affected by CVE-2026-89872?
How do I fix CVE-2026-89872?
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-2026-89872 being exploited?
There is no known exploitation of CVE-2026-89872 in the wild and no public exploit code.
Sources
Also known as AZL-101612, BELL-CVE-2026-89872, DEBIAN-CVE-2026-89872, GHSA-fhmr-xcch-3f83, UBUNTU-CVE-2026-89872.