UBUNTU-CVE-2026-88924
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.
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/versions1.48.1-2ubuntu2Source reference:
/affected/0/versions1.48.1-2ubuntu3Source reference:
/affected/0/versions1.48.1-2ubuntu5Source reference:
/affected/0/versions1.48.1-3Source reference:
/affected/0/versions1.48.1-4Source reference:
/affected/0/versions1.48.2-0ubuntu1Source reference:
/affected/0/versions1.48.2-0ubuntu1.1Source 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/versions1.52.1-1build1Source reference:
/affected/1/versions1.52.2-1Source reference:
/affected/1/versions1.53.90-2Source reference:
/affected/1/versions1.54.0-1build1Source reference:
/affected/1/versions1.54.0-1build2Source reference:
/affected/1/versions1.54.0-1build3Source reference:
/affected/1/versions1.54.0-1ubuntu2Source reference:
/affected/1/versions1.54.4-0ubuntu1~24.04.1Source reference:
/affected/1/versions1.54.4-0ubuntu1~24.04.2Source 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/versions1.57.2-2ubuntu6Source reference:
/affected/2/versions1.58.0-1ubuntu1Source reference:
/affected/2/versions1.58.0-2Source reference:
/affected/2/versions1.59.1-1Source reference:
/affected/2/versions1.59.90-3Source reference:
/affected/2/versions1.60.0-1Source 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
- Publisher date