CVE-2025-59348
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductLinuxfoundation Dragonfly
PublishedSep 17, 2025
First seenSep 17, 2025
Weakness typeCWE-457CWE-457
How to fix
Update
- linuxfoundation dragonfly2.1.0 or later
- github.com/dragonflyoss/dragonfly2.1.0 or later
- d7y.io/dragonfly/v22.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation dragonfly | v < 2.1.0 | 2.1.0 |
| github.com/dragonflyoss/dragonflyGo | v < 2.1.0, No range specified | 2.1.0 |
| d7y.io/dragonfly/v2Go | v < 2.1.0 | 2.1.0 |
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