Bug#1107797: glib2.0: CVE-2025-6052

[Salvatore Bonaccorso]

Source: glib2.0
Version: 2.75.3-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4655
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-2025-6052[0]:
| A flaw was found in how GLib’s GString manages memory when adding
| data to strings. If a string is already very large, combining it
| with more input can cause a hidden overflow in the size calculation.
| This makes the system think it has enough memory when it doesn’t. As
| a result, data may be written past the end of the allocated memory,
| leading to crashes or memory corruption.


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-2025-6052
    https://www.cve.org/CVERecord?id=CVE-2025-6052
[1] https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4655
[2] https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4656
[3] https://gitlab.gnome.org/GNOME/glib/-/commit/987309f23ada52592bffdb5db0d8a5d58bd8097b

Regards,
Salvatore