SFTP Backend Vulnerability in gvfs from GNOME
CVE-2026-84268

8.8HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
1 September 2026

What is CVE-2026-84268?

A security vulnerability exists in the SFTP backend of gvfs that allows a malicious SFTP server to manipulate the response length during file reads. This manipulation can lead to the processing of a length that exceeds the expected buffer size, resulting in an overflow condition. Consequently, this flaw can corrupt adjacent heap memory within the gvfsd-sftp process. When this corruption is detected, it causes a denial of service as the process aborts. Additionally, there is a risk that this vulnerability could be exploited to execute arbitrary code by leveraging the corrupted memory state.

References

https://access.redhat.com/security/cve/CVE-2026-84268
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2526485
issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/gvfs/-/issues/862

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Keith Linneman (LinnemanLabs) for reporting this issue.
.