UBUNTU-CVE-2026-33150

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Source
https://ubuntu.com/security/CVE-2026-33150
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-33150
Upstream
Withdrawn
2026-03-30T16:16:02Z
Published
2026-03-20T21:17:00Z
Modified
2026-03-30T18:00:05.714721Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a use-after-free vulnerability in the iouring subsystem of libfuse allows a local attacker to crash FUSE filesystem processes and potentially execute arbitrary code. When iouring thread creation fails due to resource exhaustion (e.g., cgroup pids.max), fuseuringstart() frees the ring pool structure but stores the dangling pointer in the session state, leading to a use-after-free when the session shuts down. The trigger is reliable in containerized environments where cgroup pids.max limits naturally constrain thread creation. This issue has been patched in version 3.18.2.

References

Affected packages

Ubuntu:14.04:LTS
fuse

Package

Name
fuse
Purl
pkg:deb/ubuntu/fuse@2.9.2-4ubuntu4.14.04.1?arch=source&distro=trusty

Affected ranges

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

Affected versions

2.*
2.9.2-4ubuntu3
2.9.2-4ubuntu4
2.9.2-4ubuntu4.14.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.2-4ubuntu4.14.04.1",
            "binary_name": "fuse"
        },
        {
            "binary_version": "2.9.2-4ubuntu4.14.04.1",
            "binary_name": "libfuse-dev"
        },
        {
            "binary_version": "2.9.2-4ubuntu4.14.04.1",
            "binary_name": "libfuse2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
Ubuntu:18.04:LTS
fuse

Package

Name
fuse
Purl
pkg:deb/ubuntu/fuse@2.9.7-1ubuntu1?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.9.7-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.7-1ubuntu1",
            "binary_name": "fuse"
        },
        {
            "binary_version": "2.9.7-1ubuntu1",
            "binary_name": "libfuse-dev"
        },
        {
            "binary_version": "2.9.7-1ubuntu1",
            "binary_name": "libfuse2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
Ubuntu:20.04:LTS
fuse

Package

Name
fuse
Purl
pkg:deb/ubuntu/fuse@2.9.9-3?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.9.9-1ubuntu1
2.9.9-2
2.9.9-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.9-3",
            "binary_name": "fuse"
        },
        {
            "binary_version": "2.9.9-3",
            "binary_name": "libfuse-dev"
        },
        {
            "binary_version": "2.9.9-3",
            "binary_name": "libfuse2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
fuse3

Package

Name
fuse3
Purl
pkg:deb/ubuntu/fuse3@3.9.0-2?arch=source&distro=focal

Affected ranges

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

Affected versions

3.*
3.4.1-1
3.7.0-1
3.9.0-1
3.9.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.9.0-2",
            "binary_name": "fuse3"
        },
        {
            "binary_version": "3.9.0-2",
            "binary_name": "libfuse3-3"
        },
        {
            "binary_version": "3.9.0-2",
            "binary_name": "libfuse3-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
Ubuntu:22.04:LTS
fuse

Package

Name
fuse
Purl
pkg:deb/ubuntu/fuse@2.9.9-5ubuntu3?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.9.9-5ubuntu2
2.9.9-5ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.9-5ubuntu3",
            "binary_name": "fuse"
        },
        {
            "binary_version": "2.9.9-5ubuntu3",
            "binary_name": "libfuse-dev"
        },
        {
            "binary_version": "2.9.9-5ubuntu3",
            "binary_name": "libfuse2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
fuse3

Package

Name
fuse3
Purl
pkg:deb/ubuntu/fuse3@3.10.5-1build1?arch=source&distro=jammy

Affected ranges

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

Affected versions

3.*
3.10.3-2
3.10.5-1
3.10.5-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.10.5-1build1",
            "binary_name": "fuse3"
        },
        {
            "binary_version": "3.10.5-1build1",
            "binary_name": "libfuse3-3"
        },
        {
            "binary_version": "3.10.5-1build1",
            "binary_name": "libfuse3-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
Ubuntu:24.04:LTS
fuse

Package

Name
fuse
Purl
pkg:deb/ubuntu/fuse@2.9.9-8.1build1?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.9.9-6
2.9.9-8
2.9.9-8.1
2.9.9-8.1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.9-8.1build1",
            "binary_name": "fuse"
        },
        {
            "binary_version": "2.9.9-8.1build1",
            "binary_name": "libfuse-dev"
        },
        {
            "binary_version": "2.9.9-8.1build1",
            "binary_name": "libfuse2t64"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
fuse3

Package

Name
fuse3
Purl
pkg:deb/ubuntu/fuse3@3.14.0-5build1?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.14.0-4
3.14.0-5
3.14.0-5build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.14.0-5build1",
            "binary_name": "fuse3"
        },
        {
            "binary_version": "3.14.0-5build1",
            "binary_name": "libfuse3-3"
        },
        {
            "binary_version": "3.14.0-5build1",
            "binary_name": "libfuse3-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
Ubuntu:25.10
fuse

Package

Name
fuse
Purl
pkg:deb/ubuntu/fuse@2.9.9-9?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*
2.9.9-9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.9-9",
            "binary_name": "libfuse-dev"
        },
        {
            "binary_version": "2.9.9-9",
            "binary_name": "libfuse2t64"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
fuse3

Package

Name
fuse3
Purl
pkg:deb/ubuntu/fuse3@3.17.4-1?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.14.0-10
3.17.2-2
3.17.2-3
3.17.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.17.4-1",
            "binary_name": "fuse"
        },
        {
            "binary_version": "3.17.4-1",
            "binary_name": "fuse3"
        },
        {
            "binary_version": "3.17.4-1",
            "binary_name": "libfuse3-4"
        },
        {
            "binary_version": "3.17.4-1",
            "binary_name": "libfuse3-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"
Ubuntu:Pro:16.04:LTS
fuse

Package

Name
fuse
Purl
pkg:deb/ubuntu/fuse@2.9.4-1ubuntu3.1+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

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

Affected versions

2.*
2.9.4-1ubuntu1
2.9.4-1ubuntu2
2.9.4-1ubuntu3
2.9.4-1ubuntu3.1
2.9.4-1ubuntu3.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.9.4-1ubuntu3.1+esm1",
            "binary_name": "fuse"
        },
        {
            "binary_version": "2.9.4-1ubuntu3.1+esm1",
            "binary_name": "libfuse-dev"
        },
        {
            "binary_version": "2.9.4-1ubuntu3.1+esm1",
            "binary_name": "libfuse2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33150.json"