CVE-2026-74531
Received Received - Intake

Bluetooth Use-After-Free in Linux Kernel

Publication date: 2026-08-15

Last updated on: 2026-08-15

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: hold conn reference in abort_conn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.

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Meta Information

Published
2026-08-15
Last Modified
2026-08-15
Generated
2026-08-15
AI Q&A
2026-08-15
EPSS Evaluated
N/A
NVD
CVE-2026-74531
EUVD
EUVD-2026-59724

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a theoretical Use-After-Free (UAF) vulnerability in the Linux kernel's Bluetooth subsystem. It occurs when a Bluetooth connection reference is freed while a synchronization task is still running, potentially allowing the freed memory to be accessed improperly.

Impact Analysis

If exploited, this could lead to system crashes, privilege escalation, or unauthorized memory access. However, it requires specific timing conditions and is theoretical, meaning real-world impact depends on kernel version and configuration.

Mitigation Strategies

Update the Linux kernel to the latest patched version to resolve the Bluetooth hci_conn UAF vulnerability. Monitor kernel security advisories for updates.

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