USN-8705-1

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Source
https://ubuntu.com/security/notices/USN-8705-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8705-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8705-1
Upstream
Related
Published
2026-08-31T12:57:46Z
Modified
2026-08-31T22:26:24Z
Summary
zfs-linux vulnerability
Details

It was discovered that OpenZFS incorrectly handled authorization checks for certain ioctl operations on Linux. A local attacker could possibly use this issue to perform pool-administrative operations or access privileged information, resulting in an authorization bypass.

References

Affected packages

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"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-79619",
            "severity":  [
                {
                    "score":  "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",
                    "type":  "CVSS_V4"
                },
                {
                    "score":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8705-1.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"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-79619",
            "severity":  [
                {
                    "score":  "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",
                    "type":  "CVSS_V4"
                },
                {
                    "score":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8705-1.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"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-79619",
            "severity":  [
                {
                    "score":  "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",
                    "type":  "CVSS_V4"
                },
                {
                    "score":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8705-1.json"