CVE-2026-68444
Received Received - Intake

NULL Pointer Dereference in Linux Kernel arm_ffa Driver

Publication date: 2026-08-12

Last updated on: 2026-08-12

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix NULL dereference in ffa_partition_info_get() ffa_partition_info_get() passes uuid_str directly to uuid_parse() without a NULL check. When a caller passes NULL, uuid_parse() -> __uuid_parse() -> uuid_is_valid() dereferences the pointer, causing a kernel panic: | Unable to handle kernel NULL pointer dereference at virtual address | 0000000000000040 | pc : uuid_parse+0x40/0xac | lr : ffa_partition_info_get+0x1c/0x94 [arm_ffa] Add a NULL guard before uuid_parse() so a NULL argument returns -ENODEV instead of crashing. Callers are expected to always supply a valid partition UUID, so NULL is not a supported input.

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Meta Information

Published
2026-08-12
Last Modified
2026-08-12
Generated
2026-08-12
AI Q&A
2026-08-12
EPSS Evaluated
N/A
NVD
CVE-2026-68444
EUVD
EUVD-2026-57019

Affected Vendors & Products

Currently, no data is known.

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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 is a NULL pointer dereference vulnerability in the Linux kernel's ARM FF-A (Firmware Framework for Arm) driver. The function ffa_partition_info_get() does not check if the uuid_str parameter is NULL before passing it to uuid_parse(). When NULL is passed, it causes a kernel panic due to invalid memory access.

Detection Guidance

This vulnerability is specific to the Linux kernel's arm_ffa driver and can be detected by checking kernel logs for NULL pointer dereference errors related to ffa_partition_info_get or uuid_parse. Look for messages indicating kernel panics or crashes in system logs.

Impact Analysis

If exploited, this vulnerability can crash the entire system by triggering a kernel panic. This leads to denial of service, potential data loss, and system instability. Only systems using the ARM FF-A driver with specific firmware interactions are affected.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for CVE-2026-68444. The patch adds a NULL check before calling uuid_parse to prevent kernel panics. Check your distribution's security updates or kernel release notes for the fixed version.

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