CVE-2025-7403

Bluetooth: bt_conn_tx_processor unsafe handling

Published Sep 19, 2025 CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2025-30240 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.
History
Type Values Removed Values Added
First Time appeared Zephyrproject
Zephyrproject zephyr
CPEs cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*
Vendors & Products Zephyrproject
Zephyrproject zephyr
Type Values Removed Values Added
First Time appeared Zephyrproject-rtos
Zephyrproject-rtos zephyr
Vendors & Products Zephyrproject-rtos
Zephyrproject-rtos zephyr
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Bluetooth: bt_conn_tx_processor unsafe handling
Weaknesses CWE-123
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
zephyr
Published
Updated
Oct 13, 2026, 7:59 PM
Reserved
Jul 10, 2025, 4:08 AM
Status
Analyzed
Published
Sep 19, 2025, 6:15 AM
Modified
Oct 13, 2026, 8:17 PM