CVE-2026-64081
Received Received - Intake

Linux Kernel Framework Notification Message Validation Flaw

Publication date: 2026-07-19

Last updated on: 2026-07-19

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Validate framework notification message layout Framework notifications carry an indirect message in the shared RX buffer. Validate the reported offset and size before using them, reject zero-length payloads, and ensure that any non-header payload starts at the UUID field rather than in the middle of the message header. Use the validated offset and size values for both kmemdup() and the UUID parsing path so malformed firmware data cannot drive an out-of-bounds read or an oversized allocation.

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-20
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-64081
EUVD
EUVD-2026-45654

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
linux_kernel firmware *
linux kernel *

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Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves improper validation of framework notification messages in the ARM Firmware Framework for Arm (arm_ffa). Malformed firmware data could cause an out-of-bounds read or oversized memory allocation by exploiting incorrect offset and size values in the shared RX buffer.

Detection Guidance

This vulnerability is specific to the Linux kernel's firmware handling for ARM FFA. Detection requires checking kernel logs for firmware-related errors or crashes, particularly during framework notification processing. Use commands like 'dmesg | grep -i ffa' or 'journalctl -k | grep -i ffa' to inspect kernel logs for suspicious messages.

Impact Analysis

If exploited, this flaw could allow an attacker with access to firmware to trigger memory corruption, leading to system crashes, privilege escalation, or arbitrary code execution. Users running affected Linux kernel versions should apply patches to mitigate risks.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it pertains to a low-level Linux kernel firmware handling issue. Compliance impacts would depend on system-specific implementations and whether the vulnerability could lead to unauthorized data access or processing, which is not described here.

Mitigation Strategies

Update the Linux kernel to the latest patched version. If immediate patching is not possible, restrict access to firmware interfaces or disable the affected ARM FFA functionality via kernel module parameters until a permanent fix is applied.

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