CVE-2026-68468
Received Received - Intake

MTD virt-concat duplicate name leak in Linux kernel

Publication date: 2026-08-15

Last updated on: 2026-08-17

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: mtd: virt-concat: free duplicate generated name Every MTD registration runs mtd_virt_concat_create_join(). Once a virtual concat has already been registered, the function builds the same name again and takes the equal-name branch. That branch skips to the next item without freeing the newly allocated string. Free the temporary name before continuing.

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Meta Information

Published
2026-08-15
Last Modified
2026-08-17
Generated
2026-09-04
AI Q&A
2026-08-15
EPSS Evaluated
2026-09-03
NVD
CVE-2026-68468
EUVD
EUVD-2026-59090

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux 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 a memory leak in the mtd subsystem. When a virtual MTD concat device is registered, the function mtd_virt_concat_create_join() generates a name for it. If the same device is registered again, the function recreates the name but fails to free the previously allocated string before skipping to the next item, causing a memory leak.

Detection Guidance

This vulnerability is specific to the Linux kernel's MTD subsystem and does not have a direct network detection method. It can be detected by checking kernel logs for errors related to mtd_virt_concat_create_join or duplicate MTD registration attempts.

Impact Analysis

This vulnerability could lead to gradual memory exhaustion on systems using the affected Linux kernel component. Over time, unpatched systems may experience performance degradation or crashes due to memory leaks, particularly in environments with frequent MTD device registrations.

Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA as it is a memory leak issue in the Linux kernel's MTD subsystem. It may indirectly impact compliance if the kernel crash or instability caused by the vulnerability leads to unauthorized data access or service disruption.

Mitigation Strategies

Update the Linux kernel to the latest stable version that includes the fix for this vulnerability. Monitor kernel logs for related errors and ensure no MTD devices are improperly registered.

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