CVE-2026-86469
Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.
| CWE | CWE-59 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Sep 7, 2026 |
| Last Updated | Sep 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
Low
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 10
All versions affected 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 affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Hardened Images
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-86469 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2473839 gitlab.gnome.org: https://gitlab.gnome.org/GNOME/glib/-/blob/main/gio/glocalfileoutputstream.c gitlab.gnome.org: https://gitlab.gnome.org/GNOME/glib/-/work_items/4044
Credits
Red Hat would like to thank Aisle Research for reporting this issue.