---
id: CVE-2026-91786
title: A flaw was found in GNOME Shell
summary: >-
  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 pro…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'
cwe:
  - CWE-125
vendor: Red Hat
product: gnome-shell
affected:
  - gnome-shell (all versions)
  - gnome-shell (all versions)
  - gnome-shell (all versions)
  - gnome-shell (all versions)
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:42:43.623'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91786'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-91786'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2533606'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/9365'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91786.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-91786'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91786'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T13:25:05.872453Z'
ingestedAt: '2026-09-15T11:36:07.419Z'
epss: 0.00169
epssPercentile: 0.05445
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91786.json)