CVE-2025-7403— Bluetooth: bt_conn_tx_processor unsafe handling
Quick assessment
Affected
zephyrproject-rtos Zephyr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr存在安全漏洞，该漏洞源于bt_conn_tx_processor处理不当导致释放后重用，可能造成内存损坏。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-7403
Vulnerability Information
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Vulnerability Title
Bluetooth: bt_conn_tx_processor unsafe handling
Source: CVE Program / CVE List V5
Vulnerability Description
Unsafe handling in bt_conn_tx_processor causes a use-after-free, resulting in a write-before-zero. The written 4 bytes are attacker-controlled, enabling precise memory corruption.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
任意地址可写任意内容条件
Source: CVE Program / CVE List V5
Vulnerability Title
Zephyr 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr存在安全漏洞，该漏洞源于bt_conn_tx_processor处理不当导致释放后重用，可能造成内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| zephyrproject-rtos | Zephyr | * ~ 4.1 | - |
|
II. Public POCs for CVE-2025-7403
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · zephyrproject-rtos · 2025-09-19 · 4 CVEs total
| CVE-2025-10458 | 7.6 HIGH | Bluetooth: le_conn_rsp does not sanitize CID, MTU, MPS values |
| CVE-2025-10456 | 7.1 HIGH | Bluetooth: Semi-Arbitrary ability to make the BLE Target send disconnection requests |
| CVE-2025-10457 | 4.3 MEDIUM | Bluetooth: Out-Of-Context le_conn_rsp Handling |
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V. Comments for CVE-2025-7403
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