CVE-2025-7403 HIGH

CVE-2025-7403: Bluetooth: bt_conn_tx_processor unsafe handling

Vendor Zephyrproject-Rtos

Product Zephyr

Weakness CWE-123

Published September 19, 2025

Last update September 19, 2025

View on NVD All CVEs

CVSS base score

7.6/10

Attack vector Adjacent

Attack complexity Low

Privileges required None

User interaction None

Confidentiality Low

Integrity Low

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 19, 2025 CVE published

September 19, 2025 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-7403 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/123.html

Related vulnerabilities

04Related CVE

CVE-2024-47438 Substance3D - Painter | Write-what-where Condition (CWE-123) CVE-2018-15376 Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Arbitrary Memory Write Vulnerabilities CVE-2025-14857 Semtech LR11xx Memory Write Access Control Bypass CVE-2021-42540 Emerson WirelessHART Gateway CVE-2018-15375 Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Arbitrary Memory Write Vulnerabilities