---
id: CVE-2026-84268
title: A flaw was found in the SFTP backend in gvfs
summary: >-
  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 se…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: GNOME
product: gvfs
affected:
  - gvfs < 1.60.2
  - gvfs (all versions)
  - gvfs (all versions)
  - gvfs (all versions)
  - gvfs (all versions)
  - gvfs (all versions)
published: '2026-09-01'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T23:17:01.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84268'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:73997'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:73998'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-84268'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2526485'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/gvfs/-/issues/862'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-01T18:01:43.116734Z'
epss: 0.00328
epssPercentile: 0.23454
ingestedAt: '2026-09-30T23:29:32.576Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.