Linux Kernel virt_concat virt_concat.c mtd_virt_concat_destroy_joins use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k1.05+

Summaryinfo

A vulnerability classified as very critical has been found in Linux Kernel. Impacted is the function mtd_virt_concat_destroy_joins of the file drivers/mtd/devices/virt_concat.c of the component virt_concat. This manipulation causes use after free. The identification of this vulnerability is CVE-2026-68424. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel (version now known). It has been declared as very critical. Affected by this vulnerability is the function mtd_virt_concat_destroy_joins of the file drivers/mtd/devices/virt_concat.c of the component virt_concat. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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()

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-68424 since 07/30/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/10/2026).

Applying the patch 4d91d783f93430c0efa834daff6640c07d87ebbc/75c0c09541b49daa08fddbc2c18c2232f4eab7d8 is able to eliminate this problem.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 4d91d783f93430c0efa834daff6640c07d87ebbc/75c0c09541b49daa08fddbc2c18c2232f4eab7d8

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68424 (🔒)
GCVE (CVE): GCVE-0-2026-68424
GCVE (VulDB): GCVE-100-387799

Entryinfo

Created: 08/10/2026 18:54
Changes: 08/10/2026 18:54 (58)
Complete: 🔍
Cache ID: 216::103

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