Linux Kernel up to 7.1.4/7.2-rc3 mtd mtd_virt_concat_create_join allocation of resources

Summaryinfo

A vulnerability has been found in Linux Kernel up to 7.1.4/7.2-rc3 and classified as critical. Impacted is the function mtd_virt_concat_create_join of the component mtd. The manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2026-68468. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 7.1.4/7.2-rc3. This issue affects the function mtd_virt_concat_create_join of the component mtd. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-68468 since 07/30/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/15/2026). MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 7.1.5 or 7.2-rc4 eliminates this vulnerability. Applying the patch 0e65079d28e5c461b6813ea5821be4dfff24ff63/caa0ecbeff4f7fbf70f22bd8ca598918bffb1b78 is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3
• 7.1.4
• 7.2-rc1
• 7.2-rc2
• 7.2-rc3

License

• open-source

Website

• Vendor: https://www.kernel.org/

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