Bug 2395674 (CVE-2023-53293)

Summary: CVE-2023-53293 kernel: Bluetooth: btrtl: check for NULL in btrtl_set_quirks()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-09-16 09:02:37 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: btrtl: check for NULL in btrtl_set_quirks()

The btrtl_set_quirks() has accessed btrtl_dev->ic_info->lmp_subver since
b8e482d02513. However, if installing a Realtek Bluetooth controller
without the driver supported, it will hit the NULL point accessed.

Add a check for NULL to avoid the Kernel Oops.
Comment 1 Keith Grant 2025-09-16 13:59:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091626-CVE-2023-53293-73cb@gregkh/T