CVE-2025-61724: 
Linux Debian vulnerability analysis and mitigation

CVE-2025-61724 is a security vulnerability discovered in Go programming language's net/textproto package, specifically affecting the Reader.ReadResponse function. The vulnerability was disclosed on October 7, 2025, and was fixed in Go versions 1.25.2 and 1.24.8. The issue was discovered by Jakub Ciolek and affects the Go standard library's text protocol implementation (Go Announce).

The vulnerability stems from the Reader.ReadResponse function's implementation, which constructs response strings through repeated string concatenation of lines. When processing responses with a large number of lines, this implementation can result in excessive CPU consumption due to the inefficient string concatenation operation (Go Issue, Go Announce).

When exploited, this vulnerability can lead to excessive CPU consumption in applications that process text protocol responses using the affected function. This could potentially result in degraded performance or denial of service conditions in systems processing large responses (Go Announce).

The vulnerability has been fixed in Go versions 1.25.2 and 1.24.8. Users are recommended to upgrade to these versions or later to address the issue. The fix was released as part of a security update that addressed multiple vulnerabilities (Go Announce).