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high · CVSS 7

CVE-2026-88924

Gvfs: gvfs-admin socket ownership race permits local root

Published 10 Sept 2026 · Source updated 4 Nov 2026 · Retrieved 2026-11-05 00:19 UTC

Statance checks for CVE-2026-88924. Connected servers are checked automatically against the fixed versions their distribution or package ecosystem has published for it, including app dependency lockfiles. Check my servers ↗
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What happened?

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.

Description supplied by CVE Program. Formatting is simplified; follow the original advisory for full details.

Affected software and versions

Source-provided software and version information
SoftwareVersion informationFixed version
gvfsGNOMEaffected: 1.48.1 to < 1.62.0; affected: 1.48.1 to < 1.60.3; affected: 1.48.1 to < 1.58.5See vendor advisory
gvfsRed Hatunaffected: 0:1.54.4-4.el10_2.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.54.4-2.el10_0.2 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-8.el9_8.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-4.el9_2.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-4.el9_4.1 to < *See vendor advisory
gvfsRed Hatunaffected: 0:1.48.1-6.el9_6.1 to < *See vendor advisory
gvfsRed HatDefault status: affectedSee vendor advisory
gvfsRed HatDefault status: affectedSee vendor advisory
gvfsRed HatDefault status: unaffectedSee vendor advisory

Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.

Is it being exploited?

This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.

CISA data retrieved 2026-11-06 16:38 UTC. Check CISA ↗

How to respond

  1. Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
  2. Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
  3. Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.

Sources and remediation references

This public advisory does not determine whether a particular server is affected. Records are refreshed as sources change; verify urgent decisions against the original advisory.

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