CVE-2026-88924
Gvfs: gvfs-admin socket ownership race permits local root
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Weakness
Affected products
- affected 1.48.1 – < 1.62.0
- affected 1.48.1 – < 1.60.3
- affected 1.48.1 – < 1.58.5
Red Hat · Red Hat Enterprise Linux 10
- unaffected 0:1.54.4-4.el10_2.1 – < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support
- unaffected 0:1.54.4-2.el10_0.2 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:1.48.1-8.el9_8.1 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- unaffected 0:1.48.1-4.el9_2.1 – < *
Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- unaffected 0:1.48.1-4.el9_4.1 – < *
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support
- unaffected 0:1.48.1-6.el9_6.1 – < *
Red Hat · Red Hat Enterprise Linux 6
All versions: affected
Red Hat · Red Hat Enterprise Linux 7
All versions: affected
Red Hat · Red Hat Enterprise Linux 8
All versions: unaffected
What to do
Workaround: To mitigate this issue, adjust Polkit rules to require password authentication to start gvfsd-admin or remove execute permissions of the gvfsd-admin binary to prevent execution.
References (9)
- RHSA-2026:73998 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74370 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:85939 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:85941 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:85942 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:85944 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-88924 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2531456 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/gvfs/-/issues/875 (opens in a new tab)exploit
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-88924)Record last updated .