Bug#1126550: glib2.0: CVE-2026-1485

[Salvatore Bonaccorso]

Source: glib2.0
Version: 2.86.3-4
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/glib/-/issues/3871
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-2026-1485[0]:
| A flaw was found in Glib's content type parsing logic. This buffer
| underflow vulnerability occurs because the length of a header line
| is stored in a signed integer, which can lead to integer wraparound
| for very large inputs. This results in pointer underflow and out-of-
| bounds memory access. Exploitation requires a local user to install
| or process a specially crafted treemagic file, which can lead to
| local denial of service or application instability.


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-2026-1485
    https://www.cve.org/CVERecord?id=CVE-2026-1485
[1] https://gitlab.gnome.org/GNOME/glib/-/issues/3871

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore