Zephyrproject Zephyr

Android Device Admin API OOB Write LPE via Physical Access
CVE-2025-20696 - August 04, 2025

In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS09915215; Issue ID: MSV-3801.

Memory Corruption

Buffer Overflow in dns_copy_qname: Untrusted Memcpy in dns_pack.c
CVE-2025-1675 9.1 - Critical - February 25, 2025

The function dns_copy_qname in dns_pack.c performs performs a memcpy operation with an untrusted field and does not check if the source buffer is large enough to contain the copied data.

OOB Read from Malformed Packets Input Validation Flaw
CVE-2025-1674 8.2 - High - February 25, 2025

A lack of input validation allows for out of bounds reads caused by malicious or malformed packets.

BIND OOB Read via Empty DNS Packet CVE-2025-1673
CVE-2025-1673 8.2 - High - February 25, 2025

A malicious or malformed DNS packet without a payload can cause an out-of-bounds read, resulting in a crash (denial of service) or an incorrect computation.

Zephyr Bluetooth OTS Client Input Validation Vulnerability
CVE-2024-8798 7.5 - High - December 16, 2024

No proper validation of the length of user input in olcp_ind_handler in zephyr/subsys/bluetooth/services/ots/ots_client.c.

Heap-based Buffer Overflow

RISC-V Kernel: Global Pointer (GP) Relative Addressing Misconfiguration
CVE-2024-11263 8.4 - High - November 15, 2024

When the Global Pointer (GP) relative addressing is enabled (CONFIG_RISCV_GP=y), the gp reg points at 0x800 bytes past the start of the .sdata section which is then used by the linker to relax accesses to global symbols.

Zephyr OTS Client Length Validation Vulnerability
CVE-2024-6444 6.5 - Medium - October 04, 2024

No proper validation of the length of user input in olcp_ind_handler in zephyr/subsys/bluetooth/services/ots/ots_client.c.

Memory Corruption

Zephyr RTOS Bluetooth ASCS Buffer Overflow
CVE-2024-6442 6.5 - Medium - October 04, 2024

In ascs_cp_rsp_add in /subsys/bluetooth/audio/ascs.c, an unchecked tailroom could lead to a global buffer overflow.

Memory Corruption

Zephyr UTF8 Truncation Bug: Pointer Before String on Empty Input
CVE-2024-6443 6.5 - Medium - October 04, 2024

In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.

Out-of-bounds Read

BT HCI: adv_ext_report Improper Discarding Vulnerability
CVE-2024-6259 7.6 - High - September 13, 2024

BT: HCI: adv_ext_report Improper discarding in adv_ext_report

Memory Corruption

BT: Unchecked Input in bap_broadcast_assistant (CVE-2024-5931)
CVE-2024-5931 6.3 - Medium - September 13, 2024

BT: Unchecked user input in bap_broadcast_assistant

Improper Validation of Specified Quantity in Input

BT:Classic Missing Buf Length Checks
CVE-2024-6135 6.5 - Medium - September 13, 2024

BT:Classic: Multiple missing buf length checks

Divide By Zero

BlueZ BT Classic SDP OOB Access via get_att_search_list
CVE-2024-6137 7.6 - High - September 13, 2024

BT: Classic: SDP OOB access in get_att_search_list

Stack Overflow

BT Host-side Encryption Procedure Vulnerability
CVE-2024-5754 8.2 - High - September 13, 2024

BT: Encryption procedure host vulnerability

Reliance on Untrusted Inputs in a Security Decision

Linux Kernel RFCOMM Missing net_buf Length Check (CVE20246258)
CVE-2024-6258 6.8 - Medium - September 13, 2024

BT: Missing length checks of net_buf in rfcomm_handle_data

Heap-based Buffer Overflow

Bluetooth LL_CONNECTION_UPDATE_IND Division-by-Zero Crash
CVE-2024-4785 7.6 - High - August 19, 2024

BT: Missing Check in LL_CONNECTION_UPDATE_IND Packet Leads to Division by Zero

Divide By Zero

BLE DoS via malicious packet sequencing
CVE-2024-3332 6.5 - Medium - July 03, 2024

A malicious BLE device can send a specific order of packet sequence to cause a DoS attack on the victim BLE device

NULL Pointer Dereference

BLE Device Crash via Malformed GATT Packet (CVE-2024-3077)
CVE-2024-3077 6.5 - Medium - March 29, 2024

An malicious BLE device can crash BLE victim device by sending malformed gatt packet

Integer underflow

Zephyr OS IP Stack mishandles packets with 127.0.0.1 src on external interfaces
CVE-2023-7060 7.5 - High - March 15, 2024

Zephyr OS IP packet handling does not properly drop IP packets arriving on an external interface with a source address equal to 127.0.01 or the destination address.

util-linux libmount buffer overflow via is_mount_point
CVE-2023-6881 9.8 - Critical - February 29, 2024

Possible buffer overflow in is_mount_point

Classic Buffer Overflow

CVE-2024-1638: Zephyr GATT LESC Perms Bypass Encr/Auth
CVE-2024-1638 9.1 - Critical - February 19, 2024

The documentation specifies that the BT_GATT_PERM_READ_LESC and BT_GATT_PERM_WRITE_LESC defines for a Bluetooth characteristic: Attribute read/write permission with LE Secure Connection encryption. If set, requires that LE Secure Connections is used for read/write access, however this is only true when it is combined with other permissions, namely BT_GATT_PERM_READ_ENCRYPT/BT_GATT_PERM_READ_AUTHEN (for read) or BT_GATT_PERM_WRITE_ENCRYPT/BT_GATT_PERM_WRITE_AUTHEN (for write), if these additional permissions are not set (even in secure connections only mode) then the stack does not perform any permission checks on these characteristics and they can be freely written/read.

Linux CAN Stack OOB in remove_rx_filter (CVE20235779)
CVE-2023-5779 9.8 - Critical - February 18, 2024

can: out of bounds in remove_rx_filter function

Memory Corruption

Signed-to-Unsigned Conversion in esp32_ipm_send (ESP32)
CVE-2023-6249 9.8 - Critical - February 18, 2024

Signed to unsigned conversion esp32_ipm_send

Incorrect Type Conversion or Cast

Unchecked Length in Settings Shell Exploits Buffer Overflow (BUFOVF)
CVE-2023-6749 9.8 - Critical - February 18, 2024

Unchecked length coming from user input in settings shell

Memory Corruption

BLE Buffer Overflow in Zephyr le_ecred_reconf_req (CVE-2023-5055)
CVE-2023-5055 9.8 - Critical - November 21, 2023

Possible variant of CVE-2021-3434 in function le_ecred_reconf_req.

Memory Corruption

Buffer Overflow in Zephyr OS BLE Advertising Packet Parser
CVE-2023-4424 8.8 - High - November 21, 2023

An malicious BLE device can cause buffer overflow by sending malformed advertising packet BLE device using Zephyr OS, leading to DoS or potential RCE on the victim BLE device.

Classic Buffer Overflow

Zephyr STM32 Crypto driver buffer overflow vulnerability
CVE-2023-5139 7.8 - High - October 26, 2023

Potential buffer overflow vulnerability at the following location in the Zephyr STM32 Crypto driver

Classic Buffer Overflow

Zephyr BT: Buffer overflow in hci_core.c due to disabled asserts
CVE-2023-5753 8.8 - High - October 25, 2023

Potential buffer overflows in the Bluetooth subsystem due to asserts being disabled in /subsys/bluetooth/host/hci_core.c

Classic Buffer Overflow

Zephyr WiFi Shell Buffer Overflow: unchecked input length
CVE-2023-4257 9.8 - Critical - October 13, 2023

Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.

Incorrect Calculation of Buffer Size

Zephyr nRF 15.4 Driver Buffer Overflow (CVE-2023-4263)
CVE-2023-4263 8.8 - High - October 13, 2023

Potential buffer overflow vulnerability in the Zephyr IEEE 802.15.4 nRF 15.4 driver

Classic Buffer Overflow

Linux Kernel: SJA1000 CAN Driver Fatal Exception via k_sleep() in IRQ Context
CVE-2023-5563 7.5 - High - October 13, 2023

The SJA1000 CAN controller driver backend automatically attempt to recover from a bus-off event when built with CONFIG_CAN_AUTO_BUS_OFF_RECOVERY=y. This results in calling k_sleep() in IRQ context, causing a fatal exception.

Zephyr CAN bus subsystem buffer overflow CVE-2023-3725
CVE-2023-3725 9.8 - Critical - October 06, 2023

Potential buffer overflow vulnerability in the Zephyr CAN bus subsystem

Memory Corruption

Zephyr IPM Drivers: SignedtoUnsigned Conversion + Buffer Overflows
CVE-2023-5184 8.8 - High - September 27, 2023

Two potential signed to unsigned conversion errors and buffer overflow vulnerabilities at the following locations in the Zephyr IPM drivers.

Classic Buffer Overflow

Zephyr FUSE FS Off-by-One Buffer Overflow
CVE-2023-4260 10 - Critical - September 27, 2023

Potential off-by-one buffer overflow vulnerability in the Zephyr fuse file system.

Classic Buffer Overflow

Zephyr OS Bluetooth buf ovfl vuln
CVE-2023-4264 9.6 - Critical - September 27, 2023

Potential buffer overflow vulnerabilities n the Zephyr Bluetooth subsystem.

Classic Buffer Overflow

Zephyr eS-WiFi Driver Buffer Overflow
CVE-2023-4259 8.8 - High - September 26, 2023

Two potential buffer overflow vulnerabilities at the following locations in the Zephyr eS-WiFi driver source code.

Classic Buffer Overflow

Bluetooth Mesh OOB Public Key Provisional Replay Attack
CVE-2023-4258 6.5 - Medium - September 25, 2023

In Bluetooth mesh implementation If provisionee has a public key that is sent OOB then during provisioning it can be sent back and will be accepted by provisionee.

Zephyr GATT SR int overflow OOB write remote code exec
CVE-2023-35673 8.8 - High - September 11, 2023

In build_read_multi_rsp of gatt_sr.cc, there is a possible out of bounds write due to an integer overflow. This could lead to remote (proximal/adjacent) code execution with no additional execution privileges needed. User interaction is not needed for exploitation.

Integer Overflow or Wraparound

Zephyr OS USB Driver Buffer Overflow CVE-2023-4265
CVE-2023-4265 6.8 - Medium - August 12, 2023

Potential buffer overflow vulnerabilities in the following locations: https://github.com/zephyrproject-rtos/zephyr/blob/main/drivers/usb/device/usb_dc_native_posix.c#L359 https://github.com/zephyrproject-rtos/zephyr/blob/main/drivers/usb/device/usb_dc_native_posix.c#L359 https://github.com/zephyrproject-rtos/zephyr/blob/main/subsys/usb/device/class/netusb/function_rndis... https://github.com/zephyrproject-rtos/zephyr/blob/main/subsys/usb/device/class/netusb/function_rndis.c#L841

Classic Buffer Overflow

Zephyr OS RCE via BT Controller Union Variant Confusion
CVE-2023-2234 8.8 - High - July 10, 2023

Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.

Object Type Confusion

BlueZ HCI Host Layer DoS via Dangling Pointer in State Reference
CVE-2023-1902 8 - High - July 10, 2023

The bluetooth HCI host layer logic not clearing a global reference to a state pointer after handling connection events may allow a malicious HCI Controller to cause the use of a dangling reference in the host layer, leading to a crash (DoS) or potential RCE on the Host layer.

Dangling pointer

Linux Bluetooth HCI host semaphore dangling reference DoS/RCE
CVE-2023-1901 8 - High - July 10, 2023

The bluetooth HCI host layer logic not clearing a global reference to a semaphore after synchronously sending HCI commands may allow a malicious HCI Controller to cause the use of a dangling reference in the host layer, leading to a crash (DoS) or potential RCE on the Host layer.

Memory Corruption

Linux Kernel RA Input Nullptr Deref (CVE-2023-0359)
CVE-2023-0359 7.5 - High - July 10, 2023

A missing nullptr-check in handle_ra_input can cause a nullptr-deref.

NULL Pointer Dereference

Invalid Pointer Crash Exploit in Device Firmware (CVE-2023-0779)
CVE-2023-0779 7.7 - High - May 30, 2023

At the most basic level, an invalid pointer can be input that crashes the device, but with more knowledge of the devices memory layout, further exploitation is possible.

NULL Pointer Dereference

Android Bluetooth HCI Host Stack Crash via Validation Bypass
CVE-2021-3329 6.5 - Medium - February 26, 2023

Lack of proper validation in HCI Host stack initialization can cause a crash of the bluetooth stack

Improper Initialization

Bluetooth Controller HCI Cmd Buffer Overread (Linux Kernel)
CVE-2023-0396 6.8 - Medium - January 25, 2023

A malicious / defective bluetooth controller can cause buffer overreads in the most functions that process HCI command responses.

Out-of-bounds Read

Double free in Linux Bluetooth HCI due to error handling
CVE-2022-3806 9.8 - Critical - January 25, 2023

Inconsistent handling of error cases in bluetooth hci may lead to a double free condition of a network buffer.

Double-free

Bluetooth LE le_read_buffer_size_complete DoS
CVE-2023-0397 6.5 - Medium - January 19, 2023

A malicious / defect bluetooth controller can cause a Denial of Service due to unchecked input in le_read_buffer_size_complete.

Improper Initialization

Linux Kernel Bluetooth USB Driver Buffer Overflow via net_buf_add_mem
CVE-2021-3966 8.8 - High - January 11, 2023

usb device bluetooth class includes a buffer overflow related to implementation of net_buf_add_mem.

Classic Buffer Overflow

Easily Retrieve Unencrypted Firmware via Slot 0 Upload Leak
CVE-2022-0553 4.6 - Medium - January 11, 2023

There is no check to see if slot 0 is being uploaded from the device to the host. When using encrypted images this means the unencrypted firmware can be retrieved easily.

Cleartext Transmission of Sensitive Information