Bug#1126549: glib2.0: CVE-2026-1489

[Salvatore Bonaccorso]

Source: glib2.0
Version: 2.86.3-4
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/glib/-/issues/3872
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-2026-1489[0]:
| A flaw was found in GLib. An integer overflow vulnerability in its
| Unicode case conversion implementation can lead to memory
| corruption. By processing specially crafted and extremely large
| Unicode strings, an attacker could trigger an undersized memory
| allocation, resulting in out-of-bounds writes. This could cause
| applications utilizing GLib for string conversion to crash or become
| unstable.


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-2026-1489
    https://www.cve.org/CVERecord?id=CVE-2026-1489
[1] https://gitlab.gnome.org/GNOME/glib/-/issues/3872

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore