CVE-2023-6180: Cloudflare Boring

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

The tokio-boring library in version 4.0.0 is affected by a memory leak issue that can lead to excessive resource consumption and potential DoS by resource exhaustion. The set_ex_data function used by the library did not deallocate memory used by pre-existing data in memory each time after completing a TLS connection causing the program to consume more resources with each new connection.

Affected products

Published 2023-12-05. Last modified 2026-06-17.