Source: gvfs Version: 1.60.0-2 Severity: important Tags: security upstream Forwarded: https://gitlab.gnome.org/GNOME/gvfs/-/issues/875 X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Control: found -1 1.57.2-2+deb13u1 Hi, The following vulnerability was published for gvfs. CVE-2026-88924[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-88924 https://www.cve.org/CVERecord?id=CVE-2026-88924 [1] https://gitlab.gnome.org/GNOME/gvfs/-/issues/875 [2] https://gitlab.gnome.org/GNOME/gvfs/-/merge_requests/352 Regards, Salvatore
