Medium

UBUNTU-CVE-2026-84267

Type: advisorySource: OSV1 source record

A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause read_string() to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap contents. If the server sends a short FXP_HANDLE reply, these uninitialized bytes are taken as the file handle. The client will then echo these uninitialized bytes back to the server on all subsequent requests using that handle. With a length of 128 bytes, this issue allows the malicious server to deterministically read uninitialized heap memory from the gvfsd-sftp process, leaking its heap base and the load address of the libgio library, resulting in a deterministic defeat of Address Space Layout Randomization (ASLR).

Announced 1 Sept 2026Group revision 1

Original source ↗

UBUNTU-CVE-2026-84267

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-84267

gvfs

Source reference: /affected/0/package/name

Affected versions: 1.24.2-0ubuntu4
Source reference: /affected/0/versions
1.24.2-0ubuntu5
Source reference: /affected/0/versions
1.24.2-0ubuntu6
Source reference: /affected/0/versions
1.26.2-1ubuntu1
Source reference: /affected/0/versions
1.27.3-1ubuntu1
Source reference: /affected/0/versions
1.27.4-1ubuntu1
Source reference: /affected/0/versions
1.27.90-1ubuntu1
Source reference: /affected/0/versions
1.27.92-1ubuntu1
Source reference: /affected/0/versions
1.28.1-1ubuntu1
Source reference: /affected/0/versions
1.28.2-1ubuntu1~16.04.1
Source reference: /affected/0/versions
1.28.2-1ubuntu1~16.04.2
Source reference: /affected/0/versions
1.28.2-1ubuntu1~16.04.3
Source reference: /affected/0/versions
1.28.2-1ubuntu1~16.04.3+esm1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

gvfs

Source reference: /affected/1/package/name

Affected versions: 1.34.1-1ubuntu1
Source reference: /affected/1/versions
1.34.1-1ubuntu3
Source reference: /affected/1/versions
1.34.1-1ubuntu4
Source reference: /affected/1/versions
1.34.1-2ubuntu2
Source reference: /affected/1/versions
1.35.91-1ubuntu1
Source reference: /affected/1/versions
1.35.91-1ubuntu2
Source reference: /affected/1/versions
1.36.0-1ubuntu1
Source reference: /affected/1/versions
1.36.1-0ubuntu1
Source reference: /affected/1/versions
1.36.1-0ubuntu1.1
Source reference: /affected/1/versions
1.36.1-0ubuntu1.2
Source reference: /affected/1/versions
1.36.1-0ubuntu1.3
Source reference: /affected/1/versions
1.36.1-0ubuntu1.3.2
Source reference: /affected/1/versions
1.36.1-0ubuntu1.3.3
Source reference: /affected/1/versions
1.36.1-0ubuntu1.3.3+esm1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

gvfs

Source reference: /affected/2/package/name

Affected versions: 1.42.1-1ubuntu1
Source reference: /affected/2/versions
1.42.2-1ubuntu3
Source reference: /affected/2/versions
1.43.90-1ubuntu3
Source reference: /affected/2/versions
1.43.92-1ubuntu1
Source reference: /affected/2/versions
1.44.0-1ubuntu1
Source reference: /affected/2/versions
1.44.1-1ubuntu1
Source reference: /affected/2/versions
1.44.1-1ubuntu1.1
Source reference: /affected/2/versions
1.44.1-1ubuntu1.2
Source reference: /affected/2/versions
1.44.1-1ubuntu1.2+esm1
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

gvfs

Source reference: /affected/3/package/name

Affected versions: 1.47.91-1ubuntu1
Source reference: /affected/3/versions
1.48.1-2ubuntu2
Source reference: /affected/3/versions
1.48.1-2ubuntu3
Source reference: /affected/3/versions
1.48.1-2ubuntu5
Source reference: /affected/3/versions
1.48.1-3
Source reference: /affected/3/versions
1.48.1-4
Source reference: /affected/3/versions
1.48.2-0ubuntu1
Source reference: /affected/3/versions
1.48.2-0ubuntu1.1
Source reference: /affected/3/versions
1.48.2-0ubuntu1.2
Source reference: /affected/3/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

gvfs

Source reference: /affected/4/package/name

Affected versions: 1.52.0-1
Source reference: /affected/4/versions
1.52.1-1build1
Source reference: /affected/4/versions
1.52.2-1
Source reference: /affected/4/versions
1.53.90-2
Source reference: /affected/4/versions
1.54.0-1build1
Source reference: /affected/4/versions
1.54.0-1build2
Source reference: /affected/4/versions
1.54.0-1build3
Source reference: /affected/4/versions
1.54.0-1ubuntu2
Source reference: /affected/4/versions
1.54.4-0ubuntu1~24.04.1
Source reference: /affected/4/versions
1.54.4-0ubuntu1~24.04.2
Source reference: /affected/4/versions
1.54.4-0ubuntu1~24.04.4
Source reference: /affected/4/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

gvfs

Source reference: /affected/5/package/name

Affected versions: 1.57.2-2ubuntu5
Source reference: /affected/5/versions
1.57.2-2ubuntu6
Source reference: /affected/5/versions
1.58.0-1ubuntu1
Source reference: /affected/5/versions
1.58.0-2
Source reference: /affected/5/versions
1.59.1-1
Source reference: /affected/5/versions
1.59.90-3
Source reference: /affected/5/versions
1.60.0-1
Source reference: /affected/5/versions
1.60.0-1ubuntu0.1
Source reference: /affected/5/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
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    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
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          }
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    "package": {
      "name": "gvfs",
      "purl": "pkg:deb/ubuntu/gvfs?arch=source&distro=esm-infra-legacy%2Fxenial",
      "ecosystem": "Ubuntu:Pro:16.04:LTS"
    },
    "versions": [
      "1.24.2-0ubuntu4",
      "1.24.2-0ubuntu5",
      "1.24.2-0ubuntu6",
      "1.26.2-1ubuntu1",
      "1.27.3-1ubuntu1",
      "1.27.4-1ubuntu1",
      "1.27.90-1ubuntu1",
      "1.27.92-1ubuntu1",
      "1.28.1-1ubuntu1",
      "1.28.2-1ubuntu1~16.04.1",
      "1.28.2-1ubuntu1~16.04.2",
      "1.28.2-1ubuntu1~16.04.3",
      "1.28.2-1ubuntu1~16.04.3+esm1"
    ],
    "database_specific": {
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    },
    "ecosystem_specific": {
      "binaries": [
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          "binary_version": "1.28.2-1ubuntu1~16.04.3+esm1"
        },
        {
          "binary_name": "gvfs-backends",
          "binary_version": "1.28.2-1ubuntu1~16.04.3+esm1"
        },
        {
          "binary_name": "gvfs-bin",
          "binary_version": "1.28.2-1ubuntu1~16.04.3+esm1"
        },
        {
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        },
        {
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        },
        {
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          "binary_version": "1.28.2-1ubuntu1~16.04.3+esm1"
        },
        {
          "binary_name": "gvfs-libs",
          "binary_version": "1.28.2-1ubuntu1~16.04.3+esm1"
        }
      ]
    }
  },
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      "ecosystem": "Ubuntu:Pro:18.04:LTS"
    },
    "versions": [
      "1.34.1-1ubuntu1",
      "1.34.1-1ubuntu3",
      "1.34.1-1ubuntu4",
      "1.34.1-2ubuntu2",
      "1.35.91-1ubuntu1",
      "1.35.91-1ubuntu2",
      "1.36.0-1ubuntu1",
      "1.36.1-0ubuntu1",
      "1.36.1-0ubuntu1.1",
      "1.36.1-0ubuntu1.2",
      "1.36.1-0ubuntu1.3",
      "1.36.1-0ubuntu1.3.2",
      "1.36.1-0ubuntu1.3.3",
      "1.36.1-0ubuntu1.3.3+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84267.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "gvfs",
          "binary_version": "1.36.1-0ubuntu1.3.3+esm1"
        },
        {
          "binary_name": "gvfs-backends",
          "binary_version": "1.36.1-0ubuntu1.3.3+esm1"
        },
        {
          "binary_name": "gvfs-bin",
          "binary_version": "1.36.1-0ubuntu1.3.3+esm1"
        },
        {
          "binary_name": "gvfs-common",
          "binary_version": "1.36.1-0ubuntu1.3.3+esm1"
        },
        {
          "binary_name": "gvfs-daemons",
          "binary_version": "1.36.1-0ubuntu1.3.3+esm1"
        },
        {
          "binary_name": "gvfs-fuse",
          "binary_version": "1.36.1-0ubuntu1.3.3+esm1"
        },
        {
          "binary_name": "gvfs-libs",
          "binary_version": "1.36.1-0ubuntu1.3.3+esm1"
        }
      ]
    }
  },
  {
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        "type": "ECOSYSTEM",
        "events": [
          {
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          }
        ]
      }
    ],
    "package": {
      "name": "gvfs",
      "purl": "pkg:deb/ubuntu/gvfs?arch=source&distro=esm-infra%2Ffocal",
      "ecosystem": "Ubuntu:Pro:20.04:LTS"
    },
    "versions": [
      "1.42.1-1ubuntu1",
      "1.42.2-1ubuntu3",
      "1.43.90-1ubuntu3",
      "1.43.92-1ubuntu1",
      "1.44.0-1ubuntu1",
      "1.44.1-1ubuntu1",
      "1.44.1-1ubuntu1.1",
      "1.44.1-1ubuntu1.2",
      "1.44.1-1ubuntu1.2+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84267.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "gvfs",
          "binary_version": "1.44.1-1ubuntu1.2+esm1"
        },
        {
          "binary_name": "gvfs-backends",
          "binary_version": "1.44.1-1ubuntu1.2+esm1"
        },
        {
          "binary_name": "gvfs-bin",
          "binary_version": "1.44.1-1ubuntu1.2+esm1"
        },
        {
          "binary_name": "gvfs-common",
          "binary_version": "1.44.1-1ubuntu1.2+esm1"
        },
        {
          "binary_name": "gvfs-daemons",
          "binary_version": "1.44.1-1ubuntu1.2+esm1"
        },
        {
          "binary_name": "gvfs-fuse",
          "binary_version": "1.44.1-1ubuntu1.2+esm1"
        },
        {
          "binary_name": "gvfs-libs",
          "binary_version": "1.44.1-1ubuntu1.2+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "gvfs",
      "purl": "pkg:deb/ubuntu/gvfs?arch=source&distro=jammy",
      "ecosystem": "Ubuntu:22.04:LTS"
    },
    "versions": [
      "1.47.91-1ubuntu1",
      "1.48.1-2ubuntu2",
      "1.48.1-2ubuntu3",
      "1.48.1-2ubuntu5",
      "1.48.1-3",
      "1.48.1-4",
      "1.48.2-0ubuntu1",
      "1.48.2-0ubuntu1.1",
      "1.48.2-0ubuntu1.2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84267.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "gvfs",
          "binary_version": "1.48.2-0ubuntu1.2"
        },
        {
          "binary_name": "gvfs-backends",
          "binary_version": "1.48.2-0ubuntu1.2"
        },
        {
          "binary_name": "gvfs-common",
          "binary_version": "1.48.2-0ubuntu1.2"
        },
        {
          "binary_name": "gvfs-daemons",
          "binary_version": "1.48.2-0ubuntu1.2"
        },
        {
          "binary_name": "gvfs-fuse",
          "binary_version": "1.48.2-0ubuntu1.2"
        },
        {
          "binary_name": "gvfs-libs",
          "binary_version": "1.48.2-0ubuntu1.2"
        }
      ]
    }
  },
  {
    "ranges": [
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        "type": "ECOSYSTEM",
        "events": [
          {
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        ]
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    "package": {
      "name": "gvfs",
      "purl": "pkg:deb/ubuntu/gvfs?arch=source&distro=noble",
      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "1.52.0-1",
      "1.52.1-1build1",
      "1.52.2-1",
      "1.53.90-2",
      "1.54.0-1build1",
      "1.54.0-1build2",
      "1.54.0-1build3",
      "1.54.0-1ubuntu2",
      "1.54.4-0ubuntu1~24.04.1",
      "1.54.4-0ubuntu1~24.04.2",
      "1.54.4-0ubuntu1~24.04.4"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84267.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "gvfs",
          "binary_version": "1.54.4-0ubuntu1~24.04.4"
        },
        {
          "binary_name": "gvfs-backends",
          "binary_version": "1.54.4-0ubuntu1~24.04.4"
        },
        {
          "binary_name": "gvfs-common",
          "binary_version": "1.54.4-0ubuntu1~24.04.4"
        },
        {
          "binary_name": "gvfs-daemons",
          "binary_version": "1.54.4-0ubuntu1~24.04.4"
        },
        {
          "binary_name": "gvfs-fuse",
          "binary_version": "1.54.4-0ubuntu1~24.04.4"
        },
        {
          "binary_name": "gvfs-libs",
          "binary_version": "1.54.4-0ubuntu1~24.04.4"
        }
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    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "gvfs",
      "purl": "pkg:deb/ubuntu/gvfs?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "1.57.2-2ubuntu5",
      "1.57.2-2ubuntu6",
      "1.58.0-1ubuntu1",
      "1.58.0-2",
      "1.59.1-1",
      "1.59.90-3",
      "1.60.0-1",
      "1.60.0-1ubuntu0.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84267.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "gvfs",
          "binary_version": "1.60.0-1ubuntu0.1"
        },
        {
          "binary_name": "gvfs-backends",
          "binary_version": "1.60.0-1ubuntu0.1"
        },
        {
          "binary_name": "gvfs-common",
          "binary_version": "1.60.0-1ubuntu0.1"
        },
        {
          "binary_name": "gvfs-daemons",
          "binary_version": "1.60.0-1ubuntu0.1"
        },
        {
          "binary_name": "gvfs-fuse",
          "binary_version": "1.60.0-1ubuntu0.1"
        },
        {
          "binary_name": "gvfs-libs",
          "binary_version": "1.60.0-1ubuntu0.1"
        }
      ]
    }
  }
]

Related CVEs: CVE-2026-84267
Source reference: /upstream

Publisher severity

medium

Source reference: /severity/0/score

Event: #85972 · Revision 1
Added to Heist Feed: Tue, 27 Oct 2026 04:06:11 GMT
Publisher date: Tue, 01 Sep 2026 16:17:00 GMT

Read the original announcement

Revision history

27 Oct 2026UBUNTU-CVE-2026-84267 · Revision 1Source updated