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bluetooth security

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Bluetooth security on WindowsForum.com covers vulnerabilities and fixes affecting both Windows and Linux Bluetooth stacks, reflecting the reality that modern Windows environments increasingly depend on Linux kernels through WSL, Azure, containers, and mixed-device fleets. Recent discussions include Microsoft-patched use-after-free privilege escalation in the Windows Bluetooth Service (CVE-2026-45605), Linux kernel flaws in L2CAP, HCI sync, and Intel driver paths (CVE-2026-45836, CVE-2026-43019, CVE-2026-31771, CVE-2026-43119, CVE-2026-31500), and even Bluetooth pairing weaknesses in electric motorcycles (CVE-2026-1354). Common themes include memory-safety bugs like use-after-free and data races, the importance of proper synchronization, and the need for administrators to track Bluetooth CVEs across the entire estate, not just Windows.
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    CVE-2026-45605: Windows Bluetooth Use-After-Free Privilege Escalation Patched

    Microsoft disclosed CVE-2026-45605 on June 9, 2026, as an Important-rated Windows Bluetooth Service elevation-of-privilege vulnerability caused by a use-after-free flaw and patched it across supported Windows client and server releases through the June security update cycle. The interesting part...
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    • bluetooth security cve-2026-45605 privilege escalation windows update
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    • Forum: Security Alerts
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    CVE-2026-45836 Linux Bluetooth L2CAP NULL Pointer Fix: What Windows Teams Must Do

    CVE-2026-45836 is a newly published Linux kernel Bluetooth vulnerability, disclosed by kernel.org and added to NVD on May 26, 2026, that fixes a null-pointer dereference in the L2CAP socket callback l2cap_sock_get_sndtimeo_cb(). The important part is not that this is a spectacular...
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    • bluetooth security l2cap sockets linux kernel vulnerability management
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    • Forum: Security Alerts
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    CVE-2026-43019 Linux Bluetooth Use-After-Free: Fixes, Risk, and Windows Estate Lessons

    CVE-2026-43019 is a high-severity Linux kernel Bluetooth vulnerability, published by NVD on May 1, 2026 and modified on May 8, involving a potential use-after-free in set_cig_params_sync when hci_conn access is not properly protected by the Bluetooth device lock during configuration. It is not a...
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    • bluetooth security cve 2026-43019 linux kernel wsl and hybrid it
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    • Forum: Security Alerts
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    CVE-2026-31771: Linux Kernel Bluetooth Wake-Reason Validation Bug (WSL/Azure Impact)

    CVE-2026-31771 is a high-severity Linux kernel Bluetooth flaw disclosed on May 1, 2026, in which malformed short HCI event frames could reach wake-reason address handling before per-event payload-length validation occurred. The bug is not a Windows vulnerability in the narrow sense, but it...
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    • bluetooth security cve-2026-31771 linux kernel wsl and azure
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    • Forum: Security Alerts
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    CVE-2026-43119: Linux Bluetooth hci_sync Race Fixed with READ_ONCE/WRITE_ONCE

    On May 6, 2026, CVE-2026-43119 was published for a Linux kernel Bluetooth flaw in hci_sync, where unsynchronized reads and writes of hdev->req_status could create a data race across separate kernel workqueues. The fix is small, almost boring: annotate the shared status field with READ_ONCE() and...
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    • bluetooth security concurrency bug fix cve 2026 linux kernel
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    • Forum: Security Alerts
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    CVE-2026-31500: Linux Bluetooth intel Race Causes KASAN Slab Use-After-Free Fix

    CVE-2026-31500 is a classic example of how a small synchronization mistake in a mature kernel driver can turn into a serious memory-safety bug. The flaw sits in the Linux Bluetooth Intel path, where btintel_hw_error() can race with device shutdown logic and end up touching a response buffer...
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    • bluetooth security intel btintel linux kernel use-after-free
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    • Forum: Security Alerts
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    CVE-2026-31500 Intel Bluetooth Race Fix: Prevent Kernel UAF in Shutdown Recovery

    The latest Linux Bluetooth security issue to hit public tracking is CVE-2026-31500, a kernel bug in the Intel Bluetooth driver path that can race during hardware-error recovery and device shutdown. According to the published record, the problem is that btintel_hw_error issues synchronous HCI...
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    • bluetooth security cve-2026-31500 intel bluetooth driver linux kernel
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    • Forum: Security Alerts
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    Zero Motorcycles Bluetooth Flaw Could Enable Malicious OTA Firmware (CVE-2026-1354)

    Zero Motorcycles’ latest cybersecurity disclosure is a useful reminder that the modern electric motorcycle is no longer just a vehicle; it is a rolling software platform with radios, mobile apps, firmware packages, and over-the-air update paths. In a new CISA advisory published on April 21...
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    • bluetooth security cisa advisory ot firmware zero motorcycles
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    • Forum: Security Alerts
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    Patch Alert: Windows Bluetooth RFCOMM Race Condition CVE-2026-23671 Privilege Escalation

    Microsoft has published an advisory for CVE-2026-23671: a kernel‑level race condition in the Windows Bluetooth RFCOM Protocol Driver that can be abused by a locally authenticated, low‑privilege user to escalate to SYSTEM — and Microsoft’s update guidance indicates fixes were released on March...
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    • bluetooth security kernel vulnerability privilege escalation windows security
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    • Forum: Security Alerts
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    Linux Bluetooth CVE-2025-21969: Kernel Use-After-Free in L2CAP Fixed Upstream

    A newly disclosed Linux-kernel vulnerability in the Bluetooth L2CAP implementation — tracked as CVE-2025-21969 — is a slab use-after-free in l2cap_send_cmd that can trigger kernel memory corruption and sustained denial-of-service, and it has been fixed upstream by synchronizing the HCI receive...
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    • bluetooth security cve 2025 21969 kernel vulnerability linux kernel
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    • Forum: Security Alerts
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    Linux Kernel Bluetooth L2CAP UAF Patch CVE-2024-36013

    A subtle race in the Linux kernel’s Bluetooth L2CAP code that could let the kernel touch freed memory has been fixed upstream: CVE-2024-36013 patches a slab use‑after‑free in l2cap_connect() by widening a critical section and removing a now‑dangerous return value, and distributions have started...
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    • bluetooth security cve 2024 36013 l2cap linux kernel
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    • Forum: Security Alerts
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    Linux Kernel Bluetooth RFCOMM Patch CVE-2024-26903 Fixing NULL Pointer DoS

    The Linux kernel received a targeted fix for a Bluetooth RFCOMM bug that could be weaponized to crash a host: CVE-2024-26903 is a null-pointer dereference in the rfcomm_check_security path that leads to a denial-of-service (kernel panic) when an out‑of‑order HCI response arrives during teardown...
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    • bluetooth security cve 2024 26903 linux kernel rfcomm
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    • Forum: Security Alerts
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    WHILL C2 and F Wheelchairs Face Critical Bluetooth Authentication Flaw CVE-2025-14346

    WHILL’s Model C2 electric wheelchairs and Model F power chairs are affected by a critical Bluetooth authentication flaw (tracked as CVE-2025-14346) that allows an attacker within wireless range to pair with a chair and issue movement and configuration commands without credentials, creating a...
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    • bluetooth security cve 2025 14346 iot vulnerabilities medical devices
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    • Forum: Security Alerts
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    Linux Bluetooth CVE-2024-58241: Safe HCI Core Teardown Cancels Delayed Work

    A small, surgical change in the Linux Bluetooth stack has been published under CVE-2024-58241: “Bluetooth: hci_core: Disable works on hci_unregister_dev.” The bug is a teardown/timer race in the HCI core that allowed delayed work (timers) to run against an HCI device after the device structure...
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    • bluetooth security cve 2024 58241 linux kernel use-after-free
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    • Forum: Security Alerts
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    CVE-2025-40308: Linux Bluetooth BCSP Receive Fix and Mitigation Guide

    The Linux kernel vulnerability tracked as CVE-2025-40308 is a defect in the Bluetooth BCSP (BlueCore Serial Protocol) receive path that can trigger a kernel null-pointer dereference and crash when bcsp_recv processes data while the underlying protocol has not yet been registered; the issue has...
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    • bcsp bluetooth security embedded devices linux kernel
    • Replies: 0
    • Forum: Security Alerts
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    Linux Kernel Bluetooth CVE-2025-40301 Patch: Fix Uninitialized Memory in HCI Events

    The Linux kernel received a targeted fix for a Bluetooth packet‑handling bug that could let kernel code read uninitialized memory when handling certain HCI "command complete" events — tracked as CVE‑2025‑40301 — and system administrators, distro maintainers and embedded vendors should treat this...
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    • bluetooth security cve 2025 40301 kernel patch linux kernel
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    • Forum: Security Alerts
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    CVE-2024-56591: Linux Bluetooth UAF Fix and Azure Linux Attestations

    A recently published Linux kernel security advisory, tracked as CVE‑2024‑56591, fixes a flaw in the Bluetooth stack that could allow a local actor to trigger a destructive condition during connection teardown; Microsoft’s Security Response Center (MSRC) has attested that Azure Linux images...
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    • azure linux bluetooth security linux kernel vex attestations
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    • Forum: Security Alerts
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    CVE-2025-38303: Azure Linux Bluetooth Fix and Per Artifact Attestation

    Microsoft’s brief advisory on CVE-2025-38303 confirms that Microsoft’s Azure Linux images include the upstream Linux Bluetooth code that was patched for the eir_create_adv_data crash, and Microsoft says it will update the CVE/VEX/CSAF product mapping if additional Microsoft products are later...
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    • azure linux bluetooth security cve 2025 38303 linux kernel
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    • Forum: Security Alerts
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    Unlock Seamless Connectivity: A Complete Guide to Windows Swift Pair

    Windows Swift Pair has rapidly become a notable feature for users hoping to simplify the once-cumbersome task of connecting Bluetooth devices to their PCs. Gone are the days when manually navigating complex Bluetooth settings was a frustrating, multi-step process fraught with pitfalls. Instead...
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    • bluetooth bluetooth notifications bluetooth pairing bluetooth security device compatibility device connectivity device setup devices ease of use microsoft peripheral connectivity swift pair tech tips windows windows 10 windows 11 wireless wireless peripherals
    • Replies: 0
    • Forum: Windows News
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    Windows 11 Support for Bluetooth 5.3: Profiles, Protocols, and Compatibility

    Windows 11, as of version 22H2, supports Bluetooth Core Specification version 5.3, encompassing a comprehensive range of profiles and protocols to facilitate diverse wireless functionalities. Core Specification Support: Host Controller Interface (HCI): Facilitates communication between the host...
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    • a2dp avrcp bluetooth bluetooth 5.3 bluetooth apis bluetooth device management bluetooth profiles bluetooth security device compatibility gatt hci hid microsoft support streaming windows 11 wireless
    • Replies: 0
    • Forum: Windows News
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