CVE-2026-45834
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Bluetooth Null-Pointer Dereference in Linux Kernel

Publication date: 2026-05-26

Last updated on: 2026-06-01

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().
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Meta Information
Published
2026-05-26
Last Modified
2026-06-01
Generated
2026-06-16
AI Q&A
2026-05-26
EPSS Evaluated
2026-06-14
NVD
CVE-2026-45834
EUVD
EUVD-2026-31856
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 vulnerability is a null pointer dereference issue in the Linux kernel's Bluetooth L2CAP component. Specifically, it occurs in the function l2cap_sock_state_change_cb(). The fix involved adding a NULL pointer guard similar to those already present in related functions l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

Impact Analysis

A null pointer dereference vulnerability can cause the affected system to crash or become unstable when the vulnerable code is executed. In this case, it could lead to a denial of service (DoS) condition in the Linux kernel's Bluetooth functionality, potentially disrupting Bluetooth communications or related services.

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