What’s Vulnerable › Vulnerabilities

CVE-2025-7403: Bluetooth: bt_conn_tx_processor unsafe handling

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-19 · updated 2026-10-13
• Weakness: CWE-123

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.

Affected products

• zephyrproject zephyr: through 4.1.0

References

• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-9r46-cqqw-6j2j

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