UBUNTU-CVE-2026-79619

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Source
https://ubuntu.com/security/CVE-2026-79619
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-79619
Upstream
Downstream
USN (2)
Related
USN (2)
Published
2026-08-27T00:00:00Z
Modified
2026-09-01T09:55:50Z
Severity
  • 7.3 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - high
Summary
[none]
Details

On Linux, several OpenZFS ioctl authorization checks accept a capability held only within a user-created, unprivileged namespace as equivalent to real host privilege, allowing an unprivileged local user to perform operations that should require root. Affected operations include pool-administrative operations (eg create, import, destroy), pool event log access (zpool events) and fault injection (zinject). Exploiting the problem requires only that the local user is permitted to open /dev/zfs (governed by local device permissions) and that the kernel permits unprivileged user namespace creation. No prior access to the target pool or its underlying devices is needed.

References

Affected packages

Ubuntu:Pro:18.04:LTS / zfs-linux

Package

Name
zfs-linux
Purl
pkg:deb/ubuntu/zfs-linux?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.7.5-1ubuntu16.12+esm1

Affected versions

0.*
0.6.5.11-1ubuntu3
0.6.5.11-1ubuntu4
0.6.5.11-1ubuntu5
0.6.5.11-1ubuntu6
0.7.5-1ubuntu2
0.7.5-1ubuntu3
0.7.5-1ubuntu4
0.7.5-1ubuntu5
0.7.5-1ubuntu6
0.7.5-1ubuntu7
0.7.5-1ubuntu8
0.7.5-1ubuntu9
0.7.5-1ubuntu10
0.7.5-1ubuntu11
0.7.5-1ubuntu12
0.7.5-1ubuntu13
0.7.5-1ubuntu14
0.7.5-1ubuntu15
0.7.5-1ubuntu16
0.7.5-1ubuntu16.2
0.7.5-1ubuntu16.3
0.7.5-1ubuntu16.4
0.7.5-1ubuntu16.6
0.7.5-1ubuntu16.7
0.7.5-1ubuntu16.8
0.7.5-1ubuntu16.9
0.7.5-1ubuntu16.10
0.7.5-1ubuntu16.11
0.7.5-1ubuntu16.12

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libnvpair1linux",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "libuutil1linux",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "libzfs2linux",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "libzpool2linux",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "zfs-dkms",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "zfs-dracut",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "zfs-initramfs",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "zfs-test",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "zfs-zed",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        },
        {
            "binary_name": "zfsutils-linux",
            "binary_version": "0.7.5-1ubuntu16.12+esm1"
        }
    ],
    "priority_reason": "See ubuntu cvss score"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"

Ubuntu:Pro:20.04:LTS / zfs-linux

Package

Name
zfs-linux
Purl
pkg:deb/ubuntu/zfs-linux?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.8.3-1ubuntu12.18+esm1

Affected versions

0.*
0.8.1-1ubuntu14
0.8.1-1ubuntu15
0.8.1-1ubuntu16
0.8.1-1ubuntu17
0.8.2-3ubuntu1
0.8.2-3ubuntu2
0.8.2-3ubuntu3
0.8.2-3ubuntu4
0.8.2-3ubuntu5
0.8.3-1ubuntu2
0.8.3-1ubuntu3
0.8.3-1ubuntu4
0.8.3-1ubuntu5
0.8.3-1ubuntu6
0.8.3-1ubuntu7
0.8.3-1ubuntu8
0.8.3-1ubuntu9
0.8.3-1ubuntu10
0.8.3-1ubuntu11
0.8.3-1ubuntu12
0.8.3-1ubuntu12.1
0.8.3-1ubuntu12.2
0.8.3-1ubuntu12.3
0.8.3-1ubuntu12.4
0.8.3-1ubuntu12.5
0.8.3-1ubuntu12.6
0.8.3-1ubuntu12.7
0.8.3-1ubuntu12.8
0.8.3-1ubuntu12.9
0.8.3-1ubuntu12.10
0.8.3-1ubuntu12.11
0.8.3-1ubuntu12.12
0.8.3-1ubuntu12.13
0.8.3-1ubuntu12.14
0.8.3-1ubuntu12.15
0.8.3-1ubuntu12.16
0.8.3-1ubuntu12.17
0.8.3-1ubuntu12.18

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libnvpair1linux",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "libuutil1linux",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "libzfs2linux",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "libzpool2linux",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "python3-pyzfs",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "spl",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "spl-dkms",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "zfs-dkms",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "zfs-dracut",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "zfs-initramfs",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "zfs-test",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "zfs-zed",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        },
        {
            "binary_name": "zfsutils-linux",
            "binary_version": "0.8.3-1ubuntu12.18+esm1"
        }
    ],
    "priority_reason": "See ubuntu cvss score"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"

Ubuntu:22.04:LTS / zfs-linux

Package

Name
zfs-linux
Purl
pkg:deb/ubuntu/zfs-linux?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1.5-1ubuntu6~22.04.7

Affected versions

2.*
2.0.6-1ubuntu2
2.0.6-1ubuntu3
2.1.2-1ubuntu1
2.1.2-1ubuntu2
2.1.2-1ubuntu3
2.1.4-0ubuntu0.1
2.1.5-1ubuntu6~22.04.1
2.1.5-1ubuntu6~22.04.2
2.1.5-1ubuntu6~22.04.3
2.1.5-1ubuntu6~22.04.4
2.1.5-1ubuntu6~22.04.5
2.1.5-1ubuntu6~22.04.6

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnvpair3linux",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "libpam-zfs",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "libuutil3linux",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "libzfs4linux",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "libzfsbootenv1linux",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "libzpool5linux",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "python3-pyzfs",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "zfs-dkms",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "zfs-dracut",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "zfs-initramfs",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "zfs-test",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "zfs-zed",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        },
        {
            "binary_name": "zfsutils-linux",
            "binary_version": "2.1.5-1ubuntu6~22.04.7"
        }
    ],
    "priority_reason": "See ubuntu cvss score"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"

Ubuntu:24.04:LTS / zfs-linux

Package

Name
zfs-linux
Purl
pkg:deb/ubuntu/zfs-linux?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2.2-0ubuntu9.5

Affected versions

2.*
2.2.0~rc3-0ubuntu4
2.2.0-0ubuntu1
2.2.0-0ubuntu3
2.2.1-0ubuntu1
2.2.2-0ubuntu1
2.2.2-0ubuntu2
2.2.2-0ubuntu3
2.2.2-0ubuntu4
2.2.2-0ubuntu7
2.2.2-0ubuntu8
2.2.2-0ubuntu9
2.2.2-0ubuntu9.1
2.2.2-0ubuntu9.2
2.2.2-0ubuntu9.3
2.2.2-0ubuntu9.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnvpair3linux",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "libpam-zfs",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "libuutil3linux",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "libzfs4linux",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "libzfsbootenv1linux",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "libzpool5linux",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "python3-pyzfs",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "zfs-dkms",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "zfs-dracut",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "zfs-initramfs",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "zfs-test",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "zfs-zed",
            "binary_version": "2.2.2-0ubuntu9.5"
        },
        {
            "binary_name": "zfsutils-linux",
            "binary_version": "2.2.2-0ubuntu9.5"
        }
    ],
    "priority_reason": "See ubuntu cvss score"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"

Ubuntu:26.04:LTS / zfs-linux

Package

Name
zfs-linux
Purl
pkg:deb/ubuntu/zfs-linux?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.4.1-1ubuntu5.1

Affected versions

2.*
2.3.4-1ubuntu2
2.3.5-1ubuntu1
2.3.5-1ubuntu2
2.4.0-1ubuntu2
2.4.0-1ubuntu3
2.4.0-1ubuntu4
2.4.1-1ubuntu1
2.4.1-1ubuntu2
2.4.1-1ubuntu3
2.4.1-1ubuntu4
2.4.1-1ubuntu5

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnvpair3linux",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "libpam-zfs",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "libuutil3linux",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "libzfs7linux",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "libzfsbootenv1linux",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "libzpool7linux",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "python3-pyzfs",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "zfs-dkms",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "zfs-dracut",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "zfs-initramfs",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "zfs-test",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "zfs-zed",
            "binary_version": "2.4.1-1ubuntu5.1"
        },
        {
            "binary_name": "zfsutils-linux",
            "binary_version": "2.4.1-1ubuntu5.1"
        }
    ],
    "priority_reason": "See ubuntu cvss score"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79619.json"