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CVE-2026-43017

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate mesh send advertising payload length mesh_send() currently bounds MGMT_OP_MESH_SEND by total command…

Published May 1, 2026EPSS 0.16%

Overview

CVE-2026-43017 is a medium-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: validate mesh send advertising payload length

mesh_send() currently bounds MGMT_OP_MESH_SEND by total command

length, but it never verifies that the bytes supplied for the

flexible adv_data[] array actually match the embedded adv_data_len

field. MGMT_MESH_SEND_SIZE only covers the fixed header, so a

truncated command can still pass the existing 20..50 byte range

check and later drive the async mesh send path past the end of the

queued command buffer.

Keep rejecting zero-length and oversized advertising payloads, but

validate adv_data_len explicitly and require the command length to

exactly match the flexible array size before queueing the request.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0b706fb2294aff3adfd54653bda1b5e356ad4566Refgit.kernel.org/stable/c/244b639e6a3a8e26241e201004a3a9f764476631Refgit.kernel.org/stable/c/24fa32369cf15d8fc918bdfe94097b12e6acada0Refgit.kernel.org/stable/c/562ed1954f0c1bff3422b7b752bd3dacf185edbfRefgit.kernel.org/stable/c/bda93eec78cdbfe5cda00785cefebd443e56b88bRefgit.kernel.org/stable/c/edb5898cfa91afe7e8f83eda18d93034c953d632

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43017?

CVE-2026-43017 is a medium-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43017?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-43017?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-43017?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43017 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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