CVE-2026-91786 Gnome-shell: gnome-shell: out-of-bounds read in remote search icon rendering due to unvalidated icon-data buffer size
A malicious remote search provider can trigger an out-of-bounds read in GNOME Shell, causing session crashes and potential memory disclosure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-91786?
CVE-2026-91786 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 15 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-91786?
Linux distribution packages (6)
gnome-shell SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | All versions | 45.3-150700.11.6.1 |
gnome-shell SUSE:Linux Enterprise Server 16.0 | All versions | 48.4-160000.2.1 |
gnome-shell SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 3.20.4-77.31.2 |
gnome-shell SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 48.4-160000.2.1 |
gnome-shell SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 45.3-150700.11.6.1 |
gnome-shell openSUSE:Leap 16.0 | All versions | 48.4-160000.2.1 |
How do I fix CVE-2026-91786?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-91786 being exploited?
There is no known exploitation of CVE-2026-91786 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-91786, GHSA-f22f-r8xp-wr6f, SUSE-SU-2026:23950-1, SUSE-SU-2026:4350-1, SUSE-SU-2026:4373-1, UBUNTU-CVE-2026-91786 and 1 more.