UBUNTU-CVE-2026-91786

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Source
https://ubuntu.com/security/CVE-2026-91786
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91786.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-91786
Upstream
  • CVE-2026-91786
Downstream
Related
Published
2026-09-15T11:17:00Z
Modified
2026-11-03T21:17:30Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:18.04:LTS
gnome-shell

Package

Name
gnome-shell
Purl
pkg:deb/ubuntu/gnome-shell?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.26.1-0ubuntu4
3.26.1-0ubuntu5
3.26.1-0ubuntu6
3.26.2-0ubuntu1
3.26.2-0ubuntu2
3.26.2-0ubuntu3
3.27.91-0ubuntu1
3.27.92-0ubuntu1
3.28.0-0ubuntu1
3.28.0-0ubuntu2
3.28.0-0ubuntu3
3.28.0-0ubuntu4
3.28.0-0ubuntu5
3.28.1-0ubuntu1
3.28.1-0ubuntu2
3.28.2-0ubuntu0.18.04.1
3.28.3-0ubuntu0.18.04.2
3.28.3-0ubuntu0.18.04.3
3.28.3-0ubuntu0.18.04.4
3.28.3+git20190124-0ubuntu18.04.1
3.28.3+git20190124-0ubuntu18.04.2
3.28.4-0ubuntu18.04.1
3.28.4-0ubuntu18.04.2
3.28.4-0ubuntu18.04.3
3.28.4-0ubuntu18.04.7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnome-shell",
            "binary_version": "3.28.4-0ubuntu18.04.7"
        },
        {
            "binary_name": "gnome-shell-common",
            "binary_version": "3.28.4-0ubuntu18.04.7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91786.json"
Ubuntu:20.04:LTS
gnome-shell

Package

Name
gnome-shell
Purl
pkg:deb/ubuntu/gnome-shell?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.34.1-1ubuntu1
3.34.1+git20191024-1ubuntu1
3.34.3-1ubuntu1
3.35.91-1ubuntu2
3.36.0-2ubuntu1
3.36.0-2ubuntu2
3.36.1-4ubuntu1
3.36.1-5ubuntu1
3.36.1-5ubuntu2
3.36.2-1ubuntu1~20.04.1
3.36.3-1ubuntu1~20.04.2
3.36.4-1ubuntu1~20.04.1
3.36.4-1ubuntu1~20.04.2
3.36.7-0ubuntu0.20.04.1
3.36.9-0ubuntu0.20.04.1
3.36.9-0ubuntu0.20.04.2
3.36.9-0ubuntu0.20.04.3
3.36.9-0ubuntu0.20.04.4
3.36.9-0ubuntu0.20.04.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnome-shell",
            "binary_version": "3.36.9-0ubuntu0.20.04.5"
        },
        {
            "binary_name": "gnome-shell-common",
            "binary_version": "3.36.9-0ubuntu0.20.04.5"
        },
        {
            "binary_name": "gnome-shell-extension-prefs",
            "binary_version": "3.36.9-0ubuntu0.20.04.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91786.json"
Ubuntu:22.04:LTS
gnome-shell

Package

Name
gnome-shell
Purl
pkg:deb/ubuntu/gnome-shell?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
42.9-0ubuntu2.4

Affected versions

40.*
40.5-1ubuntu2
41.*
41.3-1ubuntu1
Other
42~beta-1ubuntu2
42~beta-1ubuntu3
42.*
42.0-1ubuntu1
42.0-2ubuntu1
42.1-0ubuntu0.1
42.2-0ubuntu0.2
42.4-0ubuntu0.22.04.1
42.5-0ubuntu1
42.9-0ubuntu2
42.9-0ubuntu2.1
42.9-0ubuntu2.2
42.9-0ubuntu2.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnome-shell",
            "binary_version": "42.9-0ubuntu2.4"
        },
        {
            "binary_name": "gnome-shell-common",
            "binary_version": "42.9-0ubuntu2.4"
        },
        {
            "binary_name": "gnome-shell-extension-prefs",
            "binary_version": "42.9-0ubuntu2.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91786.json"
Ubuntu:24.04:LTS
gnome-shell

Package

Name
gnome-shell
Purl
pkg:deb/ubuntu/gnome-shell?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
46.0-0ubuntu6~24.04.17

Affected versions

45.*
45.0-1ubuntu2
45.1-1ubuntu1
45.2-1ubuntu1
45.3-1ubuntu1
46.*
46.0-0ubuntu3.1
46.0-0ubuntu4
46.0-0ubuntu5
46.0-0ubuntu5.1
46.0-0ubuntu6~24.04.1
46.0-0ubuntu6~24.04.3
46.0-0ubuntu6~24.04.4
46.0-0ubuntu6~24.04.5
46.0-0ubuntu6~24.04.6
46.0-0ubuntu6~24.04.8
46.0-0ubuntu6~24.04.9
46.0-0ubuntu6~24.04.11
46.0-0ubuntu6~24.04.12
46.0-0ubuntu6~24.04.13
46.0-0ubuntu6~24.04.14
46.0-0ubuntu6~24.04.15
46.0-0ubuntu6~24.04.16

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnome-shell",
            "binary_version": "46.0-0ubuntu6~24.04.17"
        },
        {
            "binary_name": "gnome-shell-common",
            "binary_version": "46.0-0ubuntu6~24.04.17"
        },
        {
            "binary_name": "gnome-shell-extension-prefs",
            "binary_version": "46.0-0ubuntu6~24.04.17"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91786.json"
Ubuntu:26.04:LTS
gnome-shell

Package

Name
gnome-shell
Purl
pkg:deb/ubuntu/gnome-shell?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
50.1-0ubuntu1.5

Affected versions

49.*
49.0-1ubuntu1
49.1-5ubuntu1
49.2-1ubuntu1
49.2-1ubuntu2
Other
50~beta-0ubuntu3
50.*
50.0-0ubuntu2
50.0-1ubuntu1
50.0-1ubuntu2
50.0-1ubuntu3
50.1-0ubuntu1
50.1-0ubuntu1.1
50.1-0ubuntu1.2
50.1-0ubuntu1.3
50.1-0ubuntu1.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnome-shell",
            "binary_version": "50.1-0ubuntu1.5"
        },
        {
            "binary_name": "gnome-shell-common",
            "binary_version": "50.1-0ubuntu1.5"
        },
        {
            "binary_name": "gnome-shell-extension-prefs",
            "binary_version": "50.1-0ubuntu1.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91786.json"
Ubuntu:Pro:16.04:LTS
gnome-shell

Package

Name
gnome-shell
Purl
pkg:deb/ubuntu/gnome-shell?arch=source&distro=esm-apps%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.16.4-0ubuntu1
3.18.1-1ubuntu1
3.18.2-0ubuntu1
3.18.2-0ubuntu2
3.18.3-3ubuntu1
3.18.4-0ubuntu1
3.18.4-0ubuntu2
3.18.4-0ubuntu3
3.18.5-0ubuntu0.1
3.18.5-0ubuntu0.2
3.18.5-0ubuntu0.3
3.18.5-0ubuntu0.3+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnome-shell",
            "binary_version": "3.18.5-0ubuntu0.3+esm1"
        },
        {
            "binary_name": "gnome-shell-common",
            "binary_version": "3.18.5-0ubuntu0.3+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91786.json"