Vulnerability DatabaseCVE-2025-7403
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CVE-2025-7403
September 19, 2025
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.
Affected Packages
https://github.com/zephyrproject-rtos/zephyr.git (GITHUB):
Affected version(s) >=v1.0.0 <v4.2.0
Fix Suggestion:
Update to version v4.2.0
Related Resources (1)
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-9r46-cqqw-6j2j
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CVSS v4
Base Score:
7.2
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.6
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
HIGH
Weakness Type (CWE)
Write-what-where Condition
CWE-123
EPSS
Base Score:
0.02