UnratedFix available

UBUNTU-CVE-2026-88924

Type: advisorySource: OSV1 source record

A flaw was found in the admin backend of gvfs. The privileged gvfsd-admin daemon changes the ownership of newly created private D-Bus sockets by calling the link-following chown() function on a pathname inside a user-controlled directory. A local attacker can exploit this via a Time-of-Check Time-of-Use (TOCTOU) race condition and exchange the socket pathname with a symbolic link pointing to an arbitrary root-owned file (such as /etc/pam.d/su). The daemon subsequently follows the symlink and changes the ownership of the targeted root-owned file to the attacker's user ID. This allows an authenticated local attacker to modify critical system files, leading to a full local privilege escalation to root.

Announced 10 Sept 2026Source revision 1

Original source ↗

UBUNTU-CVE-2026-88924

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-2026-88924

gvfs

Source reference: /affected/0/package/name

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

gvfs

Source reference: /affected/1/package/name

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

gvfs

Source reference: /affected/2/package/name

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

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.48.2-0ubuntu1.2"
          }
        ]
      }
    ],
    "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"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88924.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"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.54.4-0ubuntu1~24.04.4"
          }
        ]
      }
    ],
    "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"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88924.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"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.60.0-1ubuntu0.1"
          }
        ]
      }
    ],
    "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"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88924.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"
        }
      ],
      "availability": "No subscription required"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #59331 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 18:26:54 GMT
Publisher date: Thu, 10 Sep 2026 15:17:00 GMT

Read the original announcement