Critical Buffer Overflow Vulnerability in GVFS Package
Summary
ALSA-2026:73997: Important: gvfs security update. Affects gvfs versions < 1.36.2-22.el8_10. Fixed in 1.36.2-22.el8_10. How to fix ↓
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Background
GVFS (GNOME Virtual File System) is a crucial component of the GNOME desktop environment that facilitates seamless access to 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 user-friendly manner. However, a serious vulnerability has been identified that could compromise the security of systems utilizing GVFS.
Vulnerability Detail
The vulnerability stems from a heap-based buffer overflow in the read_reply() function of the SFTP component of GVFS. This flaw can be exploited by an attacker to execute arbitrary code, potentially leading to unauthorized access, data corruption, or system crashes. The vulnerability is tracked under CVE-2026-84268 and poses a significant risk to users who rely on the SFTP protocol for file transfers.
How To Fix
Minimum fixed version
1.36.2-22.el8_10
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 disable the SFTP functionality in GVFS until the package is updated. This can be done by modifying the configuration settings or by avoiding the use of SFTP for file transfers.
Conclusion
The identified buffer overflow vulnerability in the GVFS package poses a significant risk to users, particularly those utilizing the SFTP protocol. It is crucial to update to the patched version to mitigate potential threats. Users should also consider temporary workarounds until the update can be applied.
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.
A buffer overflow occurs when data exceeds a buffer's storage capacity, leading to potential code execution and system compromise.
You can use Vulert, which monitors open-source vulnerabilities in software using a manifest file. Visit Vulert Scanner to check your application without signup.
Consider disabling the SFTP functionality in GVFS as a temporary measure until you can apply the update.
Yes, this vulnerability is classified as critical due to its potential to allow arbitrary code execution.
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