# CVE-2025-38390: firmware: arm\_ffa: Fix memory leak by freeing notifier callback node

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-07-25 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.7

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
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## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/076fa20b4f5737c34921dbb152f9efceaee571b2
- https://git.kernel.org/stable/c/938827c440564b2cf2f9b804d1fe81ce8267eded
- https://git.kernel.org/stable/c/a833d31ad867103ba72a0b73f3606f4ab8601719

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