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CVE-2026-43069

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ll: Fix firmware leak on error path Smatch reports: drivers/bluetooth/hci_ll.c:587 download_firmware() warn: 'f…

Published May 5, 2026CWE-401EPSS 0.16%

Overview

CVE-2026-43069 is a medium-severity vulnerability. It was published on May 5, 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: hci_ll: Fix firmware leak on error path

Smatch reports:

drivers/bluetooth/hci_ll.c:587 download_firmware() warn:

'fw' from request_firmware() not released on lines: 544.

In download_firmware(), if request_firmware() succeeds but the returned

firmware content is invalid (no data or zero size), the function returns

without releasing the firmware, resulting in a resource leak.

Fix this by calling release_firmware() before returning when

request_firmware() succeeded but the firmware content is invalid.

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/28904375d54b436a757641fb0331537778c0de5aRefgit.kernel.org/stable/c/31148a7be723aa9f2e8fbd62424825ab8d577973Refgit.kernel.org/stable/c/5213ef54528dd1ac79b846e30d8f72ce092794aaRefgit.kernel.org/stable/c/95e8601af227b2b4390eecf8db6abdb9f6a91f17Refgit.kernel.org/stable/c/9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074bRefgit.kernel.org/stable/c/a7803df606a7d22e896b030f619e1d9d20ae0c6bRefgit.kernel.org/stable/c/b2dfbf1b5ff192cefd49574b951a4af9ddd32213Refgit.kernel.org/stable/c/e6d95488c8c964d1df0d3e1db44c958706311e86

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43069?

CVE-2026-43069 is a medium-severity vulnerability. It was published on May 5, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43069?

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-2026-43069?

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-2026-43069?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43069 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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