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CVE-2026-43134

8.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ This adds a check for encryption key size upon receiving L2C…

Published May 6, 2026EPSS 0.24%

Overview

CVE-2026-43134 is a high-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ

This adds a check for encryption key size upon receiving

L2CAP_LE_CONN_REQ which is required by L2CAP/LE/CFC/BV-15-C which

expects L2CAP_CR_LE_BAD_KEY_SIZE.

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/138d7eca445ef37a0333425d269ee59900ca1104Refgit.kernel.org/stable/c/335071c0c3637064ec250481f589075db44fe4e6Refgit.kernel.org/stable/c/481ea39b342c347b6ac029f3d418486280be4e45Refgit.kernel.org/stable/c/8dd43f9a9323f9c01bc8246da8d81a4c783c9e97Refgit.kernel.org/stable/c/9118601ff90b79e8df3c0c98f48ae00c1b02ecefRefgit.kernel.org/stable/c/96581749c7c14fbec32c35728520867929600041Refgit.kernel.org/stable/c/ec91078e132179b04e0c3906b599816c056ceaadRefgit.kernel.org/stable/c/fa6ad76fa8623c0a50d529cd5726fa5d819a3be4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43134?

CVE-2026-43134 is a high-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-43134?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-43134?

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-2026-43134?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43134 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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