CVE-2025-7403: Zephyrproject Zephyr

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Zephyrproject Zephyr: up to and including 4.1.0

Published 2025-09-19. Last modified 2026-06-17.