Bug#1147411: glib2.0: CVE-2026-86469

[Salvatore Bonaccorso]

Source: glib2.0
Version: 2.90.0-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/glib/-/work_items/4044
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for glib2.0.

CVE-2026-86469[0]:
| 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.


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-2026-86469
    https://www.cve.org/CVERecord?id=CVE-2026-86469
[1] https://gitlab.gnome.org/GNOME/glib/-/work_items/4044

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore