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Vulnerability DatabaseCVE-2023-53293

CVE-2023-53293: 
Linux Kernel vulnerability analysis and mitigation

Overview

CVE-2023-53293 is a vulnerability in the Linux kernel's Bluetooth subsystem, specifically in the btrtlsetquirks() function. The vulnerability was discovered and disclosed on September 16, 2025. It affects various Linux distributions including Ubuntu, Debian, and their derivatives that use the affected kernel versions (NVD, Ubuntu).

Technical details

The vulnerability occurs in the btrtlsetquirks() function which has been accessing btrtldev->icinfo->lmp_subver since commit b8e482d02513. When installing a Realtek Bluetooth controller without supported driver, the function attempts to access a NULL pointer, resulting in a kernel oops (NVD).

Impact

When exploited, this vulnerability causes a kernel oops condition when attempting to install an unsupported Realtek Bluetooth controller. This can lead to system instability and potential denial of service (NVD).

Mitigation and workarounds

The vulnerability has been fixed in various Linux distributions. Ubuntu has marked it as 'Not affected' in newer releases (24.04 LTS and 25.04), while it remains vulnerable in some older versions like 22.04 LTS. Debian has fixed the issue in bookworm (6.1.153-1) and later versions (Debian, Ubuntu).

Additional resources

Source: This report was generated using AI

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