Vulnerability · Published Sep 17, 2025 · Assigned by GitHub_M

CVE-2025-59351Dragonfly possibly panics due to nil pointer dereference when using variables created alongside an error

Low 2.7

In plain English

A low-severity null pointer dereference in dragonfly from dragonflyoss. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)2.7Low

Exploit odds (30 days)0.3%top 75.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Dragonfly is an open source P2P-based file distribution and image acceleration system. Prior to 2.1.0, the first return value of a function is dereferenced even when the function returns an error. This can result in a nil dereference, and cause code to panic. This vulnerability is fixed in 2.1.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	d7y.io/dragonfly/v2	2.1.0	GHSA-4mhv-8rh3-4ghw
Go	d7y.io/dragonfly/v2	2.1.0	GO-2025-3970
Go	github.com/dragonflyoss/dragonfly	2.1.0	GHSA-4mhv-8rh3-4ghw
Go	github.com/dragonflyoss/dragonfly	no fix listed	GO-2025-3970

Affected products (as reported)

Vendor	Product	Versions
dragonflyoss	dragonfly	< 2.1.0

Weakness: CWE-476 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

References

https://github.com/dragonflyoss/dragonfly/security/advisories/GHSA-4mhv-8rh3-4ghw x_refsource_CONFIRM
https://github.com/dragonflyoss/dragonfly/blob/main/docs/security/dragonfly-comprehensive-report-2023.pdf x_refsource_MISC