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CVE-2026-53364

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() hci_le_big_terminate() allocates iso_list_data via kzalloc_obj b…

Published Jul 13, 2026CWE-401EPSS 0.12%

Overview

CVE-2026-53364 is a medium-severity vulnerability. It was published on July 13, 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_conn: Fix memory leak in hci_le_big_terminate()

hci_le_big_terminate() allocates iso_list_data via kzalloc_obj but

returns 0 without freeing it when neither pa_sync_term nor big_sync_term

flags are set after evaluating the PA and BIG sync connection state.

This early-return path was introduced when hci_le_big_terminate() was

refactored to take struct hci_conn instead of raw u8 parameters, adding

PA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue

failure does not cover this path.

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/488e808e3fa53200f3ef3324c45fcba4ae9f4972Refgit.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0Refgit.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229Refgit.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53364?

CVE-2026-53364 is a medium-severity vulnerability. It was published on July 13, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53364?

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-2026-53364?

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-2026-53364?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53364 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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