Bug#1126551: glib2.0: CVE-2026-1484

[Salvatore Bonaccorso]

Source: glib2.0
Version: 2.86.3-4
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/glib/-/issues/3870
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-2026-1484[0]:
| A flaw was found in the GLib Base64 encoding routine when processing
| very large input data. Due to incorrect use of integer types during
| length calculation, the library may miscalculate buffer boundaries.
| This can cause memory writes outside the allocated buffer.
| Applications that process untrusted or extremely large Base64 input
| using GLib may crash or behave unpredictably.


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-2026-1484
    https://www.cve.org/CVERecord?id=CVE-2026-1484
[1] https://gitlab.gnome.org/GNOME/glib/-/issues/3870

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore