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Date: Thu, 17 Sep 2026 22:21:28 +0100
From: Simon McVittie <smcv@debian.org>
To: Salvatore Bonaccorso <carnil@debian.org>, 1148176-done@bugs.debian.org
Subject: Re: Bug#1148176: gnome-shell: CVE-2026-91786
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References: <178967644151.24356.3578961342084395301.reportbug@eldamar.lan>
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X-Debian-User: smcv

Version: 50.5-1

On Thu, 17 Sep 2026 at 22:20:41 +0200, Salvatore Bonaccorso wrote:
>| 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

This appears to have been fixed in 50.5 and 51.0 upstream.

According to discussion upstream, probably a more important attack route 
is that if a sandboxed app is given direct access to 
org.freedesktop.Notifications (as opposed to xdg-desktop-portal's 
org.freedesktop.portal.Notification, which is designed to be used by 
semi-trusted sandboxed apps, and validates the icon), it could present a 
malformed icon data blob that way.

     smcv]