Local Privilege Escalation Vulnerability in libinput Package
Summary
ALSA-2026:39296: Moderate: libinput security update. Affects libinput versions < 1.30.1-2.el10_2. Fixed in 1.30.1-2.el10_2. How to fix ↓
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Background
libinput is a library designed to handle input devices for display servers and applications that require direct interaction with input hardware. It provides a unified interface for various input devices, ensuring consistent behavior across different environments. This library is crucial for managing devices like keyboards, mice, and touchpads, making it an essential component in many Linux distributions, including AlmaLinux. However, a recent vulnerability has been identified that could allow local privilege escalation through crafted uinput devices, posing a significant security risk.
Vulnerability Detail
The vulnerability identified as CVE-2026-50292 allows local users to escalate their privileges by exploiting crafted uinput devices. This issue arises from insufficient validation of input device configurations, enabling attackers to manipulate device settings and gain unauthorized access to higher privileges within the system. The ramifications of this vulnerability could lead to unauthorized actions being performed by malicious users, potentially compromising the integrity and security of the system.
How To Fix
Minimum fixed version
1.30.1-2.el10_2
This is the first release that contains the fix.
sudo dnf update libinputTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit access to the uinput device by adjusting permissions or disabling the use of uinput devices until the package is updated. This can be done by executing the following command: 'sudo chmod 600 /dev/uinput'. However, this workaround may affect the functionality of applications relying on uinput devices.
Conclusion
The libinput package has a critical vulnerability that allows local privilege escalation through crafted uinput devices. It is crucial for users to update their packages to the latest version to mitigate this risk. Additionally, temporary workarounds can be implemented to limit exposure until the update is applied. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system security.
See every vulnerability recorded for libinput →
FAQ
CVE-2026-50292 is a security vulnerability in the libinput package that allows local privilege escalation through crafted uinput devices.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If exploited, this vulnerability could allow unauthorized users to gain elevated privileges, potentially compromising system security.
You can update the affected packages by running the command 'sudo dnf update libinput libinput-devel libinput-utils' in your terminal.
Yes, the permanent fix is to update the libinput package to version 1.30.1-2.el10_2 or later, which addresses the security issue.
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