CVE-2026-79619

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Source
https://cve.org/CVERecord?id=CVE-2026-79619
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79619.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-79619
Aliases
  • GHSA-mhf5-q8gw-qg9v
Downstream
Published
2026-08-26T12:50:10Z
Modified
2026-10-28T02:30:33Z
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
Summary
OpenZFS: user-namespace capability check allows unprivileged local authorization bypass
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.

Database specific 
{
    "cna_assigner":  "canonical",
    "cwe_ids":  [
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79619.json"
}
References

Affected packages

Git / github.com/openzfs/zfs

Affected ranges

Type
GIT
Repo
https://github.com/openzfs/zfs
Events
Introduced
ccad64314ab55963c1a0731ff62c8cf6c6976f28
Fixed
f2d87f5c724ccdbb27a11fb84c4a185e0a917598
Introduced
bc06d8164b8b6673ca2dc9b36090f91a5d6348b3
Fixed
4c0eb7203e5a2b147d1d5e27b5e2a3461a95c1dc
Introduced
743334913e5a5f60baf287bcc6d8a23515b02ac5
Fixed
71a9f9578616a90c3c14bb59629fb4d31bfd68d1
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0.7.0"
                },
                {
                    "fixed":  "2.2.11"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "introduced":  "2.3.0"
                },
                {
                    "fixed":  "2.3.9"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "introduced":  "2.4.0"
                },
                {
                    "fixed":  "2.4.4"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "original_tag":  "zfs-2.4.4",
            "range":  [
                {
                    "fixed":  "71a9f9578616a90c3c14bb59629fb4d31bfd68d1"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "zfs-2.3.9",
            "range":  [
                {
                    "fixed":  "4c0eb7203e5a2b147d1d5e27b5e2a3461a95c1dc"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "zfs-2.2.11",
            "range":  [
                {
                    "fixed":  "f2d87f5c724ccdbb27a11fb84c4a185e0a917598"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

zfs-0.*
zfs-0.7.0
zfs-0.8.0
zfs-0.8.0-rc1
zfs-0.8.0-rc2
zfs-0.8.0-rc3
zfs-0.8.0-rc4
zfs-0.8.0-rc5
zfs-2.*
zfs-2.0.0-rc1
zfs-2.1.0-rc1
zfs-2.1.99
zfs-2.2.0
zfs-2.2.0-rc1
zfs-2.2.0-rc2
zfs-2.2.0-rc3
zfs-2.2.0-rc4
zfs-2.2.0-rc5
zfs-2.2.1
zfs-2.2.10
zfs-2.2.2
zfs-2.2.3
zfs-2.2.4
zfs-2.2.5
zfs-2.2.6
zfs-2.2.7
zfs-2.2.8
zfs-2.2.9
zfs-2.3.0
zfs-2.3.1
zfs-2.3.2
zfs-2.3.3
zfs-2.3.4
zfs-2.3.5
zfs-2.3.6
zfs-2.3.7
zfs-2.3.8
zfs-2.4.0
zfs-2.4.1
zfs-2.4.2
zfs-2.4.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79619.json"