CVE-2026-64220: device property: set fwnode->secondary to NULL in fwnode_init()
In the Linux kernel, the following vulnerability has been resolved:
device property: set fwnode->secondary to NULL in fwnodeinit()
If a firmware node is allocated on the stack (for instance: temporary software node whose life-time we control) or on the heap - but using a non-zeroing allocation function - and initialized using fwnodeinit(), its secondary pointer will contain uninitalized memory which likely will be neither NULL nor ISERR() and so may end up being dereferenced (for example: in devtoswnode()). Set fwnode->secondary to NULL on initialization.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64220?
CVE-2026-64220 has a risk score of 34.
How do I fix CVE-2026-64220?
To fix CVE-2026-64220, apply the latest patches to the Linux kernel that address this vulnerability.
What impact does CVE-2026-64220 have on systems?
CVE-2026-64220 can potentially lead to improper handling of firmware nodes resulting in stability issues.
Which versions of the Linux kernel are affected by CVE-2026-64220?
CVE-2026-64220 affects certain versions of the Linux kernel prior to the fixed release.
Is CVE-2026-64220 a remote or local vulnerability?
CVE-2026-64220 is typically considered a local vulnerability, affecting code execution within the local context.