CVE-2026-64080: firmware: arm_ffa: Snapshot notifier callbacks under lock
In the Linux kernel, the following vulnerability has been resolved:
firmware: armffa: Snapshot notifier callbacks under lock
Both notification handlers currently look up a notifier callback under notifylock, drop the lock, and then dereference the returned notifier entry. A concurrent unregister can delete and free that entry in the gap, leaving the handler to dereference stale memory.
Copy the callback pointer and callback data while notifylock is still held and invoke the callback only after the lock is dropped. This keeps the existing callback execution model while removing the use-after-free window in both the framework and non-framework notification paths.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64080?
CVE-2026-64080 has a critical severity score of 9.3 on the CVSS scale.
How do I fix CVE-2026-64080?
To fix CVE-2026-64080, update the Linux kernel to the latest patched version that addresses this vulnerability.
What type of vulnerability is CVE-2026-64080?
CVE-2026-64080 is classified as a Use After Free vulnerability within the Linux kernel.
What software is affected by CVE-2026-64080?
CVE-2026-64080 affects the Linux kernel, particularly components related to arm_ffa.
What are the potential consequences of CVE-2026-64080?
Exploiting CVE-2026-64080 could lead to unauthorized access and potential control over affected systems due to improper handling of notifier callbacks.