Linux Kernel up to 6.17.7/6.18-rc3 Bluetooth set_mesh_complete out-of-bounds

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.17.7/6.18-rc3. It has been classified as critical. This affects the function set_mesh_complete of the component Bluetooth. The manipulation leads to out-of-bounds. This vulnerability is documented as CVE-2025-40213. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.17.7/6.18-rc3 and classified as critical. This issue affects the function set_mesh_complete of the component Bluetooth. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete There is a BUG: KASAN: stack-out-of-bounds in set_mesh_sync due to memcpy from badly declared on-stack flexible array. Another crash is in set_mesh_complete() due to double list_del via mgmt_pending_valid + mgmt_pending_remove. Use DEFINE_FLEX to declare the flexible array right, and don't memcpy outside bounds. As mgmt_pending_valid removes the cmd from list, use mgmt_pending_free, and also report status on error.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2025-40213 since 04/16/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 276662 (Linux Distros Unpatched Vulnerability : CVE-2025-40213), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.17.8 or 6.18-rc4 eliminates this vulnerability. Applying the patch 5c19daa93d9af29f1f46251b47e1ea66bcc8d679/1c9aca1787e8395a2c59fef20e914467958969c5/e8785404de06a69d89dcdd1e9a0b6ea42dc6d327 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (276662) and CERT Bund (WID-SEC-2025-2672). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Google Container-Optimized OS
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.17.0
• 6.17.1
• 6.17.2
• 6.17.3
• 6.17.4
• 6.17.5
• 6.17.6
• 6.17.7
• 6.18-rc1
• 6.18-rc2
• 6.18-rc3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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