CVE-2026-90213 firewire: core: fix memory leak in error path of build_tree()
A memory leak in the Linux kernel's firewire subsystem allows local attackers to cause denial of service by triggering error paths in build_tree().
- 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-2026-90213?
CVE-2026-90213 is a memory corruption vulnerability in Linux, published on 17 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:
firewire: core: fix memory leak in error path of build_tree()
In the error path of build_tree(), node instances can remain in the local linked list when the function returns.
Whenever an invalid value is detected in the self ID sequence, each allocated node instance is either an entry in the linked list or an entry in the ports array of its parent node. Therefore, the allocate node instances can be safely released by traversing the linked list from its head.
Release the remaining node instances with for_each_fw_node() before returning to the caller.
Which versions are affected by CVE-2026-90213?
How do I fix CVE-2026-90213?
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-2026-90213 being exploited?
There is no known exploitation of CVE-2026-90213 in the wild and no public exploit code.
Sources
Also known as AZL-102359, BELL-CVE-2026-90213, DEBIAN-CVE-2026-90213, GHSA-584h-rw5g-vhjq, UBUNTU-CVE-2026-90213.