DEBIAN-CVE-2026-88924

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Source
https://security-tracker.debian.org/tracker/CVE-2026-88924
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88924.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-88924
Upstream
Published
2026-09-10T15:17:59Z
Modified
2026-09-17T16:00:08Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / gvfs

Package

Name
gvfs
Purl
pkg:deb/debian/gvfs?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.50.3-1
1.50.3-1+deb12u1
1.50.4-1
1.50.4-2
1.50.4-3
1.50.6-1
1.51.90-1
1.51.91-1
1.52.0-1
1.52.1-1
1.52.2-1
1.53.90-1
1.53.90-2
1.53.90-3
1.53.90-4
1.54.0-1
1.54.0-2
1.54.0-3
1.54.0-4
1.54.1-1
1.54.2-1
1.54.2-2
1.55.90-1
1.55.90-2
1.56.0-1
1.56.0-2
1.56.1-1
1.57.1-1
1.57.2-1
1.57.2-2
1.57.2-3
1.58.0-1
1.58.0-2
1.59.1-1
1.59.90-1
1.59.90-2
1.59.90-3
1.60.0-1
1.60.0-2
1.62.0-1
1.62.0-2
1.62.0-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88924.json"

Debian:13 / gvfs

Package

Name
gvfs
Purl
pkg:deb/debian/gvfs?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.57.2-2
1.57.2-2+deb13u1
1.57.2-3
1.58.0-1
1.58.0-2
1.59.1-1
1.59.90-1
1.59.90-2
1.59.90-3
1.60.0-1
1.60.0-2
1.62.0-1
1.62.0-2
1.62.0-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88924.json"

Debian:14 / gvfs

Package

Name
gvfs
Purl
pkg:deb/debian/gvfs?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.62.0-1

Affected versions

1.*
1.57.2-2
1.57.2-3
1.58.0-1
1.58.0-2
1.59.1-1
1.59.90-1
1.59.90-2
1.59.90-3
1.60.0-1
1.60.0-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88924.json"