CVE-2025-59348: Linuxfoundation Dragonfly

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Dragonfly is an open source P2P-based file distribution and image acceleration system. Prior to 2.1.0, the processPieceFromSource method does not update the structure’s usedTraffic field, because an uninitialized variable n is used as a guard to the AddTraffic method call, instead of the result.Size variable. A task is processed by a peer. The usedTraffic metadata is not updated during the processing. Rate limiting is incorrectly applied, leading to a denial-of-service condition for the peer. This vulnerability is fixed in 2.1.0.

Affected products

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