High
firejail — security advisory
A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.
- Products
- firejail
- Affected versions
- 0.9.28-1, 0.9.32-1, 0.9.34-1, 0.9.36-1, 0.9.38-1, 0.9.38-1ubuntu0.1, 0.9.38.10-0ubuntu0.16.04.1, 0.9.50-3, 0.9.52-1, 0.9.52-2, 0.9.60-2, 0.9.62-1, 0.9.62-2, 0.9.62-3, 0.9.62-3ubuntu0.1, 0.9.64.4-2, 0.9.66-2, 0.9.72-2, 0.9.72-2ubuntu3, 0.9.72-2ubuntu4, 0.9.72-2ubuntu5, 0.9.80-1
- Fixed versions
- Not specified
- CVEs
- CVE-2022-31214
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:01 UTC · Revision 1
Source evidence
A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.
osv:UBUNTU-CVE-2022-31214
firejail
Fixed versions: Not specified
firejail
Fixed versions: Not specified
firejail
Fixed versions: Not specified
firejail
Fixed versions: Not specified
firejail
Fixed versions: Not specified
firejail
Fixed versions: Not specified
firejail
Fixed versions: Not specified
firejail
Fixed versions: Not specified
Complete source record
{
"id": "98f4d42c45b310ba888e5c2f619e138539492596b01206fe1c2d9d4bf96bf014",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-31214",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2022-31214",
"summary": "A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.",
"evidence": "osv:UBUNTU-CVE-2022-31214",
"products": [
{
"name": {
"value": "firejail",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.28-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.9.32-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.9.34-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.9.36-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.9.38-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.9.38-1ubuntu0.1",
"evidence": "/affected/0/versions"
},
{
"value": "0.9.38.10-0ubuntu0.16.04.1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "firejail",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.50-3",
"evidence": "/affected/1/versions"
},
{
"value": "0.9.52-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.9.52-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "firejail",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.60-2",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.62-1",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.62-2",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.62-3",
"evidence": "/affected/2/versions"
},
{
"value": "0.9.62-3ubuntu0.1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "firejail",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.64.4-2",
"evidence": "/affected/3/versions"
},
{
"value": "0.9.66-2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "firejail",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.72-2",
"evidence": "/affected/4/versions"
},
{
"value": "0.9.72-2ubuntu3",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "firejail",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.72-2ubuntu3",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "firejail",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.72-2ubuntu5",
"evidence": "/affected/6/versions"
},
{
"value": "0.9.80-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "firejail",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.9.72-2ubuntu3",
"evidence": "/affected/7/versions"
},
{
"value": "0.9.72-2ubuntu4",
"evidence": "/affected/7/versions"
},
{
"value": "0.9.72-2ubuntu5",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2022-31214",
"aliases": [
"UBUNTU-CVE-2022-31214"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"0.9.28-1",
"0.9.32-1",
"0.9.34-1",
"0.9.36-1",
"0.9.38-1",
"0.9.38-1ubuntu0.1",
"0.9.38.10-0ubuntu0.16.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.38.10-0ubuntu0.16.04.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"0.9.50-3",
"0.9.52-1",
"0.9.52-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.52-2"
},
{
"binary_name": "firejail-profiles",
"binary_version": "0.9.52-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"0.9.60-2",
"0.9.62-1",
"0.9.62-2",
"0.9.62-3",
"0.9.62-3ubuntu0.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.62-3ubuntu0.1"
},
{
"binary_name": "firejail-profiles",
"binary_version": "0.9.62-3ubuntu0.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"0.9.64.4-2",
"0.9.66-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.66-2"
},
{
"binary_name": "firejail-profiles",
"binary_version": "0.9.66-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.9.72-2",
"0.9.72-2ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.72-2ubuntu3"
},
{
"binary_name": "firejail-profiles",
"binary_version": "0.9.72-2ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"0.9.72-2ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.72-2ubuntu3"
},
{
"binary_name": "firejail-profiles",
"binary_version": "0.9.72-2ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"0.9.72-2ubuntu5",
"0.9.80-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.80-1"
},
{
"binary_name": "firejail-profiles",
"binary_version": "0.9.80-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "firejail",
"purl": "pkg:deb/ubuntu/firejail?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.9.72-2ubuntu3",
"0.9.72-2ubuntu4",
"0.9.72-2ubuntu5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-31214.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "firejail",
"binary_version": "0.9.72-2ubuntu5"
},
{
"binary_name": "firejail-profiles",
"binary_version": "0.9.72-2ubuntu5"
}
]
}
}
],
"modified": "2026-10-17T12:56:21.854947526Z",
"provider": "osv",
"upstream": [
"CVE-2022-31214"
],
"references": [
"https://ubuntu.com/security/CVE-2022-31214",
"https://marc.info/?i=YqCar9IFTyPnq2o0@f195.suse.de",
"https://www.cve.org/CVERecord?id=CVE-2022-31214"
]
},
"related_cves": [
{
"value": "CVE-2022-31214",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355434,
"published_at": "2022-06-09T16:15:00+00:00"
}