gnome-shell: A flaw was found in GNOME Shell
CVE-2026-91786 is fixed in 3 products on 1 platform, first by gnome-shell 42.9-0ubuntu2.4, released September 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| gnome-shell · Debian 14 | 50.5-1 | DEBIAN-CVE-2026-91786 | Sep 21, 2026 |
| gnome-shell · Ubuntu 22.04.1 LTS (jammy) | 42.9-0ubuntu2.4 | gnome-shell 42.9-0ubuntu2.4 | Sep 15, 2026 |
| gnome-shell · Ubuntu 24.04.5 LTS (noble) | 46.0-0ubuntu6~24.04.17 | gnome-shell 46.0-0ubuntu6~24.04.17 | Sep 15, 2026 |
| gnome-shell · Ubuntu 26.04.1 LTS (resolute) | 50.1-0ubuntu1.5 | gnome-shell 50.1-0ubuntu1.5 | Sep 15, 2026 |
| gnome-shell · opensuse-leap 16.0 | 48.4-160000.2.1 | OPENSUSE-SU-2026:21976-1 | Sep 29, 2026 |
| gnome-shell · sles 15.7 | 45.3-150700.11.6.1 | SUSE-SU-2026:4373-1 | Sep 28, 2026 |
| gnome-shell · sles 16.0 | 48.4-160000.2.1 | SUSE-SU-2026:23950-1 | Sep 29, 2026 |
| gnome-shell-common · Ubuntu 22.04.1 LTS (jammy) | 42.9-0ubuntu2.4 | gnome-shell-common 42.9-0ubuntu2.4 | Sep 15, 2026 |
| gnome-shell-common · Ubuntu 24.04.5 LTS (noble) | 46.0-0ubuntu6~24.04.17 | gnome-shell-common 46.0-0ubuntu6~24.04.17 | Sep 15, 2026 |
| gnome-shell-common · Ubuntu 26.04.1 LTS (resolute) | 50.1-0ubuntu1.5 | gnome-shell-common 50.1-0ubuntu1.5 | Sep 15, 2026 |
| gnome-shell-extension-prefs · Ubuntu 22.04.1 LTS (jammy) | 42.9-0ubuntu2.4 | gnome-shell-extension-prefs 42.9-0ubuntu2.4 | Sep 15, 2026 |
| gnome-shell-extension-prefs · Ubuntu 24.04.5 LTS (noble) | 46.0-0ubuntu6~24.04.17 | gnome-shell-extension-prefs 46.0-0ubuntu6~24.04.17 | Sep 15, 2026 |
| gnome-shell-extension-prefs · Ubuntu 26.04.1 LTS (resolute) | 50.1-0ubuntu1.5 | gnome-shell-extension-prefs 50.1-0ubuntu1.5 | Sep 15, 2026 |
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