Description
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.
Published: 2026-09-01
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Workaround

To mitigate this vulnerability, do not connect to untrusted SFTP servers.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 02 Sep 2026 08:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Gvfs: sftp: heap-based buffer overflow in read_reply()
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-122
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Subscriptions

Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-02T13:36:51.481Z

Reserved: 2026-09-01T14:05:54.144Z

Link: CVE-2026-84268

cve-icon Vulnrichment

Updated: 2026-09-01T18:01:54.999Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-01T16:17:37.563

Modified: 2026-09-02T14:17:16.170

Link: CVE-2026-84268

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-02T03:45:04Z

Weaknesses
  • CWE-122

    Heap-based Buffer Overflow