CVE-2026-64080 Details
Description
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Snapshot notifier callbacks under lock Both notification handlers currently look up a notifier callback under notify_lock, 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 notify_lock 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.
A use-after-free vulnerability has been addressed in the Linux kernel's ARM firmware framework. The issue arose in the snapshot notifier callbacks, where the notification handlers would look up a callback under a lock, release the lock, and then dereference the callback. This created a window where a concurrent unregistration could free the callback entry, leading to the handler accessing invalid memory. The vulnerability has been fixed by modifying the callback handling to retain the callback pointer and data while the lock is held, ensuring safe execution after the lock is released.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. The specific commit addressing this issue is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0e7be42ef2490f19d859a6146324d48cafdc9d5c | kernel.org | Patch |
| https://git.kernel.org/stable/c/38290b180a4d5746baed796d49f88d56d2f336cd | kernel.org | Patch |
| https://git.kernel.org/stable/c/d1e38551fadea230649bc428f0f35c9ee062a072 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.15, < 6.18.34 >= 6.19, < 7.0.11 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 3, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |