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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: gnome-shell: CVE-2026-91786
Message-ID: <178967644151.24356.3578961342084395301.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0+nmu1
Date: Thu, 17 Sep 2026 22:20:41 +0200
Delivered-To: submit@bugs.debian.org

Source: gnome-shell
Version: 50.4-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/9365
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for gnome-shell.

CVE-2026-91786[0]:
| A flaw was found in GNOME Shell. When processing icons from a remote
| search provider via D-Bus, the system fails to validate the icon's
| declared dimensions against the actual data buffer size. A malicious
| or compromised remote search provider could exploit this by
| providing oversized icon dimensions, leading to an out-of-bounds
| read. This can cause the GNOME Shell process to crash, disrupting
| the user's session, and potentially disclose sensitive information
| from adjacent memory.


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-2026-91786
    https://www.cve.org/CVERecord?id=CVE-2026-91786
[1] https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/9365
[2] https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/4417

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]