Critical Security Flaw in GVFS: Heap-Based Buffer Overflow and Socket Ownership Race
Summary
RLSA-2026:74370: Important: gvfs security update. Affects gvfs versions < 0:1.48.1-8.el9_8.1. Fixed in 0:1.48.1-8.el9_8.1. How to fix ↓
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Background
GVFS, or GNOME Virtual File System, is a crucial component of the GNOME desktop environment that facilitates seamless access to both local and remote data through various protocols such as FTP, SFTP, WebDAV, CIFS, and SMB. It integrates with the GNOME I/O (GIO) abstraction layer, allowing users to interact with files and directories in a unified manner. However, recent vulnerabilities have been identified that could compromise the security of systems utilizing GVFS.
Vulnerability Detail
The vulnerabilities in GVFS stem from two critical issues: a heap-based buffer overflow in the read_reply() function (CVE-2026-84268) and a socket ownership race condition that could allow local users to gain root privileges (CVE-2026-88924). The buffer overflow could lead to arbitrary code execution, while the socket race condition poses a significant risk of privilege escalation, potentially allowing unauthorized access to sensitive system resources.
How To Fix
Minimum fixed version
0:1.48.1-8.el9_8.1
This is the first release that contains the fix.
sudo dnf update gvfsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit access to the GVFS service or disable the affected protocols until the package is updated. This can be done by modifying the configuration files or using system settings to restrict access.
Conclusion
The identified vulnerabilities in GVFS pose significant risks to system security, including potential arbitrary code execution and privilege escalation. It is crucial for users to update their GVFS package to the latest version to mitigate these risks effectively.
See every vulnerability recorded for gvfs →
FAQ
GVFS is the GNOME Virtual File System that allows users to access local and remote files through various protocols.
The main vulnerabilities include a heap-based buffer overflow and a socket ownership race condition that can lead to privilege escalation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for this vulnerability is 8.8, indicating a high severity level.
You can update GVFS by running the command 'sudo dnf update gvfs' in your terminal.
References
Related vulnerabilities
Recent vulnerabilities recorded for gvfs.
