CVE-2026-88924Gvfs: gvfs-admin socket ownership race permits local root
Updated under an hour ago ()
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It affects GNOME gvfs and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.0 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-367
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GNOME gvfs gnome:gvfs (from the name) | from 1.48.1 before 1.62.0; from 1.48.1 before 1.60.3; from 1.48.1 before 1.58.5 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:1.54.4-4.el10_2.1 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:73998vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:74370vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-88924vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2531456issue-tracking, x-refsource-redhat
- https://gitlab.gnome.org/GNOME/gvfs/-/issues/875
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.