# CVE-2026-91786: 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-91786
- Priority: Routine
- CVSS: 6.1 (Medium)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 15, 2026

## Description

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

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gnome-shell Debian 14 | 50.5-1 | [DEBIAN-CVE-2026-91786](https://patchblox.com/security/data/fix/linux/debian-cve-2026-91786.md) | Sep 21, 2026 |
| Linux | gnome-shell Ubuntu 22.04.1 LTS (jammy) | 42.9-0ubuntu2.4 | [gnome-shell 42.9-0ubuntu2.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gnome-shell-42.9-0ubuntu2.4.md) | Sep 15, 2026 |
| Linux | gnome-shell Ubuntu 24.04.5 LTS (noble) | 46.0-0ubuntu6~24.04.17 | [gnome-shell 46.0-0ubuntu6~24.04.17](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gnome-shell-46.0-0ubuntu6-24.04.17.md) | Sep 15, 2026 |
| Linux | gnome-shell Ubuntu 26.04.1 LTS (resolute) | 50.1-0ubuntu1.5 | [gnome-shell 50.1-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gnome-shell-50.1-0ubuntu1.5.md) | Sep 15, 2026 |
| Linux | gnome-shell opensuse-leap 16.0 | 48.4-160000.2.1 | [OPENSUSE-SU-2026:21976-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21976-1.md) | Sep 29, 2026 |
| Linux | gnome-shell sles 15.7 | 45.3-150700.11.6.1 | [SUSE-SU-2026:4373-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4373-1.md) | Sep 28, 2026 |
| Linux | gnome-shell sles 16.0 | 48.4-160000.2.1 | [SUSE-SU-2026:23950-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23950-1.md) | Sep 29, 2026 |
| Linux | gnome-shell-common Ubuntu 22.04.1 LTS (jammy) | 42.9-0ubuntu2.4 | [gnome-shell-common 42.9-0ubuntu2.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gnome-shell-common-42.9-0ubuntu2.4.md) | Sep 15, 2026 |
| Linux | gnome-shell-common Ubuntu 24.04.5 LTS (noble) | 46.0-0ubuntu6~24.04.17 | [gnome-shell-common 46.0-0ubuntu6~24.04.17](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gnome-shell-common-46.0-0ubuntu6-24.04.17.md) | Sep 15, 2026 |
| Linux | gnome-shell-common Ubuntu 26.04.1 LTS (resolute) | 50.1-0ubuntu1.5 | [gnome-shell-common 50.1-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gnome-shell-common-50.1-0ubuntu1.5.md) | Sep 15, 2026 |
| Linux | gnome-shell-extension-prefs Ubuntu 22.04.1 LTS (jammy) | 42.9-0ubuntu2.4 | [gnome-shell-extension-prefs 42.9-0ubuntu2.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gnome-shell-extension-prefs-42.9-0ubuntu2.4.md) | Sep 15, 2026 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gnome-shell-extension-prefs-46.0-0ubuntu6-24.04.17.md) | Sep 15, 2026 |
| Linux | gnome-shell-extension-prefs Ubuntu 26.04.1 LTS (resolute) | 50.1-0ubuntu1.5 | [gnome-shell-extension-prefs 50.1-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gnome-shell-extension-prefs-50.1-0ubuntu1.5.md) | Sep 15, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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