CVE-2025-38390 firmware: arm_ffa: Fix memory leak by freeing notifier callback node
A memory leak in the Linux kernel's ARM FFA driver allows attackers to exhaust system memory, potentially causing a denial of service.
- 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-2025-38390?
CVE-2025-38390 is a medium-severity denial of service vulnerability in Linux kernel, published on 25 Jul 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:
firmware: arm_ffa: Fix memory leak by freeing notifier callback node
Commit e0573444edbf ("firmware: arm_ffa: Add interfaces to request notification callbacks") adds support for notifier callbacks by allocating and inserting a callback node into a hashtable during registration of notifiers. However, during unregistration, the code only removes the node from the hashtable without freeing the associated memory, resulting in a memory leak.
Resolve the memory leak issue by ensuring the allocated notifier callback node is properly freed after it is removed from the hashtable entry.
Weakness: CWE-401
Which versions are affected by CVE-2025-38390?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-38390?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-38390 being exploited?
There is no known exploitation of CVE-2025-38390 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-38390, DEBIAN-CVE-2025-38390, GHSA-hxvp-23fc-849f, ROOT-OS-UBUNTU-2404-CVE-2025-38390, UBUNTU-CVE-2025-38390.