Moderate Security Vulnerability in ncurses Package: Buffer Overflow Risk
Summary
RLSA-2026:5913: Moderate: ncurses security update. Affects ncurses versions < 0:6.4-15.20240127.el10_1. Fixed in 0:6.4-15.20240127.el10_1. How to fix ↓
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Background
The ncurses library provides a terminal-independent method for updating character screens, optimizing the display of text-based interfaces. It includes utilities such as tic (terminfo compiler), infocmp (decompiler), and tools for terminal management like clear, tput, and tset. This package is widely used in various applications that require terminal handling, making its security critical.
Vulnerability Detail
The ncurses package has a buffer overflow vulnerability identified as CVE-2025-69720. This flaw allows an attacker to exploit the buffer overflow, potentially leading to arbitrary code execution on affected systems. The vulnerability arises from improper handling of input data, which can be manipulated to overflow the buffer, compromising the integrity and security of the application using ncurses.
How To Fix
Minimum fixed version
0:6.4-15.20240127.el10_1
This is the first release that contains the fix.
sudo dnf update ncursesTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, you can limit the use of ncurses in applications that are vulnerable until the package is updated. However, it is highly recommended to apply the patch as soon as possible to ensure full protection.
Conclusion
The ncurses package has a moderate security vulnerability that poses a risk of buffer overflow, potentially allowing arbitrary code execution. It is crucial to update to the patched version to mitigate this risk. Regular monitoring and prompt updates are essential for maintaining security in software applications.
See every vulnerability recorded for ncurses →
FAQ
A buffer overflow vulnerability occurs when a program writes more data to a buffer than it can hold, which can lead to unexpected behavior, including the execution of arbitrary code.
You can use Vulert to monitor and alert for open-source vulnerabilities. By utilizing the Vulert playground, you can check if your application is affected without needing to sign up.
If exploited, this vulnerability could allow attackers to execute arbitrary code, potentially leading to unauthorized access, data breaches, or system compromise.
Yes, the CVSS score for this vulnerability is 7.8, indicating a high severity level that requires prompt attention.
If an immediate update is not possible, consider implementing strict input validation and limiting the use of affected applications until the patch can be applied.
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