CVE-2026-68424
Received Received - Intake

Use-After-Free in Linux Kernel MTD Virt Concat

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy_joins() mtd_concat_destroy() frees item->concat so calling mtd_virt_concat_put_mtd_devices(item->concat) leads to a use after free. Fix this by moving mtd_virt_concat_put_mtd_devices() before mtd_concat_destroy()

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68424
EUVD
EUVD-2026-55610

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

Helpful Resources

Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in the Linux kernel's mtd subsystem. It occurs in the mtd_virt_concat_destroy_joins function where mtd_concat_destroy frees memory that is later accessed by mtd_virt_concat_put_mtd_devices, leading to a use-after-free condition.

Detection Guidance

This vulnerability is specific to the Linux kernel's mtd subsystem and requires kernel-level inspection. Detection involves checking kernel logs for mtd-related errors or crashes. Use commands like dmesg | grep mtd or journalctl -k | grep mtd to search for related errors. If you suspect exploitation, monitor for abnormal mtd device behavior or kernel panics.

Impact Analysis

This vulnerability could allow an attacker to execute arbitrary code, escalate privileges, or cause a denial of service by triggering the use-after-free condition in the Linux kernel's mtd subsystem.

Mitigation Strategies

Update your Linux kernel to the latest stable version that includes the fix for CVE-2026-68424. If immediate patching is not possible, avoid using mtd_virt_concat functionality until patched. Monitor vendor advisories for kernel updates and apply them promptly.

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