CVE-2025-61724

Excessive CPU consumption in Reader.ReadResponse in net/textproto

State: Published
Severity: 5.3 Medium
Published: Oct 29, 2025
Updated: Nov 4, 2025
Reserved: Sep 30, 2025

Description

The Reader.ReadResponse function constructs a response string through repeated string concatenation of lines. When the number of lines in a response is large, this can cause excessive CPU consumption.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
net/textprotoGo standard library	before 1.24.8Affected 1.25.0 to before 1.25.2Affected

References

https://go.dev/cl/709859
https://go.dev/issue/75716
https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI
https://pkg.go.dev/vuln/GO-2025-4015
http://www.openwall.com/lists/oss-security/2025/10/08/1

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