CVE-2026-84268

A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause read_reply() to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing the operation to write past the intended boundaries. This issue allows a malicious server to corrupt adjacent heap memory in the gvfsd-sftp process, resulting in a denial of service as the process aborts upon detecting the heap corruption or potentially allowing arbitrary code execution.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-01 16:17

Updated : 2026-09-02 14:17

NVD link : CVE-2026-84268

Mitre link : CVE-2026-84268

CVE.ORG link : CVE-2026-84268

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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