CVE-2026-12236 Infinite loop (DoS) in Bluetooth GATT client parsing of Read-By-Type responses with zero data length

The Bluetooth host GATT client function parsereadstdchardesc in subsys/bluetooth/host/gatt.c parses an ATT Read By Type Response received from a remote GATT server during BTGATTDISCOVERSTDCHARDESC discovery. The per-entry stride rsp-len is taken directly from the peer's PDU, and the parse loop bo...

EUVD-2026-58131

The Bluetooth host GATT client function parsereadstdchardesc in subsys/bluetooth/host/gatt.c parses an ATT Read By Type Response received from a remote GATT server during BTGATTDISCOVERSTDCHARDESC discovery. The per-entry stride rsp-len is taken directly from the peer's PDU, and the parse loop bo...

CVE-2026-12236

The CVE concerns the Zephyr Bluetooth host GATT client, where parse_read_std_char_desc() can loop indefinitely if an attacker causes a peer to reply with rsp->len = 0 during BT_GATT_DISCOVER_STD_CHAR_DESC. The loop uses rsp->len to advance the pointer and decrement remaining length, but rsp...

CVE-2026-10772

DUPLICATE This CVE Record has been rejected by the Zephyr Project CNA. CVE-2026-10772 was assigned to a vulnerability already covered by CVE-2026-2411, which was assigned earlier for the same defect: the Bluetooth GATT notify/indicate paths check the permissions of the Characteristic Declaration...

EUVD-2026-51869

Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Characteristic Declaration whose permission is hard-coded to BTGATTPERMREAD, and a Characteristic Value attribute that carries the application-specified security permissions e.g. BTGATTPERMREADENCRYPT /...

CVE-2026-2411 Bluetooth GATT notify/indicate enforces the wrong attribute's permissions, bypassing encryption/authentication requirements on characteristic values

Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Characteristic Declaration whose permission is hard-coded to BTGATTPERMREAD, and a Characteristic Value attribute that carries the application-specified security permissions e.g. BTGATTPERMREADENCRYPT /...

CVE-2026-2411

CVE-2026-2411 affects Zephyr’s Bluetooth host GATT: when a Characteristic Declaration is used with a value that requires encryption/authentication, the permission check erroneously evaluated the declaration instead of the value, allowing the Notification/Indicate path to bypass encryption require...

EUVD-2026-51554

The Zephyr Bluetooth GATT client CCC-write response handler gattwritecccrsp in subsys/bluetooth/host/gatt.c invoked the application's params-subscribe callback after it had already called params-notifyconn, params, NULL, 0. Per the public GATT API, a notify callback with NULL data is the document...

CVE-2026-10685 Use-after-free of GATT subscribe params in Bluetooth host CCC-write response handler

The Zephyr Bluetooth GATT client CCC-write response handler gattwritecccrsp in subsys/bluetooth/host/gatt.c invoked the application's params-subscribe callback after it had already called params-notifyconn, params, NULL, 0. Per the public GATT API, a notify callback with NULL data is the document...

CVE-2026-10685 Use-after-free of GATT subscribe params in Bluetooth host CCC-write response handler

The Zephyr Bluetooth GATT client CCC-write response handler gattwritecccrsp in subsys/bluetooth/host/gatt.c invoked the application's params-subscribe callback after it had already called params-notifyconn, params, NULL, 0. Per the public GATT API, a notify callback with NULL data is the document...

CVE-2026-10685

CVE-2026-10685 : In Zephyr, the GATT client CCC-write response handler gatt_write_ccc_rsp() may call the application’s params->subscribe() after already invoking params->notify(conn, params, NULL, 0). A NULL data notify signals termination; calling subscribe() on the same bt_gatt_subscribe_...

NewStart CGSL MAIN 6.06 : kernel Multiple Vulnerabilities (NS-SA-2026-0063)

The remote NewStart CGSL host, running version MAIN 6.06, has kernel packages installed that are affected by multiple vulnerabilities: - BlueZ HID over GATT Profile Improper Access Control Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitra...

CVE-2026-10660

The CVE-2026-10660 issue affects the Zephyr Bluetooth BAP Broadcast Assistant GATT client (subsys/bluetooth/audio/bap_broadcast_assistant.c). A single static net_buf_simple buffer (att_buf, BT_ATT_MAX_ATTRIBUTE_LEN = 512) is shared across all connections; per-connection state (BUSY flag, long-rea...

CVE-2026-10660

The Bluetooth BAP Broadcast Assistant GATT client in subsys/bluetooth/audio/bapbroadcastassistant.c reassembled remote Broadcast Receive State data into a single file-static netbufsimple attbuf, BTATTMAXATTRIBUTELEN = 512 bytes shared by all connection instances, while the BUSY flag, long-read...

CVE-2026-5768

The Frontier X2 device allows unauthenticated BLE read/write access to critical GATT characteristics without enforcing pairing authentication or authorization. This allows attackers within BLE range to perform unauthorized control of device functions, including starting/stopping activities,...

CVE-2026-5768

CVE-2026-5768 concerns the Frontier X2 device and Frontier X mobile app, where unauthenticated BLE read/write access to critical GATT characteristics enables attackers within BLE range to control device functions, trigger vibrations, cause DoS, and forge health telemetry by impersonating devices ...

CVE-2026-5768

The Frontier X2 device allows unauthenticated BLE read/write access to critical GATT characteristics without enforcing pairing authentication or authorization. This allows attackers within BLE range to perform unauthorized control of device functions, including starting/stopping activities,...

CVE-2026-5768 Fourth Frontier Frontier X Mobile Application, Frontier X2 Missing Authentication for Critical Function

The Frontier X2 device allows unauthenticated BLE read/write access to critical GATT characteristics without enforcing pairing authentication or authorization. This allows attackers within BLE range to perform unauthorized control of device functions, including starting/stopping activities,...

Astra Linux – Vulnerability in bluez

The clifeatreadcb function in src/gatt-database.c does not perform bounds checks on the 'offset' variable before using it as an index into an array for reading...

Astra Linux – Vulnerability in bluez

A issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free condition can occur when a client disconnects during D-Bus processing of a WriteValue call...