CriticalFix available
incus, lxd — security advisory
Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.
- Products
- incus, lxd
- Affected versions
- 5.0.2+git20231211.1364ae4-1, 5.0.2+git20231211.1364ae4-2, 5.0.2+git20231211.1364ae4-3, 5.0.2+git20231211.1364ae4-4, 5.0.2+git20231211.1364ae4-5, 5.0.2+git20231211.1364ae4-6, 5.0.2+git20231211.1364ae4-7, 5.0.2+git20231211.1364ae4-8, 5.0.2+git20231211.1364ae4-9, 5.0.2+git20231211.1364ae4-9+deb13u1, 5.0.2+git20231211.1364ae4-9+deb13u2, 5.0.2+git20231211.1364ae4-9+deb13u3, 5.0.2+git20231211.1364ae4-9+deb13u4, 5.0.2-5, 5.0.2-5+deb12u1, 5.0.2-5+deb12u2, 5.0.2-5+deb12u3, 5.0.2-5+deb12u4, 5.0.2-5+deb12u5, 5.0.2-5+deb12u6, 5.0.2-6
- Fixed versions
- 5.0.2+git20231211.1364ae4-9+deb13u5, 6.0.2-1
- CVEs
- CVE-2026-34177
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:37 UTC · Revision 2
Source evidence
Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.
osv:DEBIAN-CVE-2026-34177
incus
Fixed versions: 6.0.2-1
incus
Fixed versions: 6.0.2-1
lxd
Fixed versions: Not specified
lxd
Fixed versions: 5.0.2+git20231211.1364ae4-9+deb13u5
Complete source record
{
"id": "09abb74d54218e6ab35482811ec22fd00b2709e28940c43e84b1c791fbf3bb91",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-34177",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-34177",
"summary": "Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.",
"evidence": "osv:DEBIAN-CVE-2026-34177",
"products": [
{
"name": {
"value": "incus",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.0.2-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "incus",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.0.2-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "lxd",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.0.2+git20231211.1364ae4-1",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-2",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-3",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-4",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-5",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-6",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-7",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-8",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u1",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u2",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u3",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u4",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u5",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-5+deb12u6",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.2-6",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "lxd",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u5",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "5.0.2+git20231211.1364ae4-9",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u1",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u2",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u3",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u4",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2026-34177",
"aliases": [
"DEBIAN-CVE-2026-34177"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.2-1"
}
]
}
],
"package": {
"name": "incus",
"purl": "pkg:deb/debian/incus?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34177.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.2-1"
}
]
}
],
"package": {
"name": "incus",
"purl": "pkg:deb/debian/incus?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34177.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "lxd",
"purl": "pkg:deb/debian/lxd?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.0.2+git20231211.1364ae4-1",
"5.0.2+git20231211.1364ae4-2",
"5.0.2+git20231211.1364ae4-3",
"5.0.2+git20231211.1364ae4-4",
"5.0.2+git20231211.1364ae4-5",
"5.0.2+git20231211.1364ae4-6",
"5.0.2+git20231211.1364ae4-7",
"5.0.2+git20231211.1364ae4-8",
"5.0.2+git20231211.1364ae4-9",
"5.0.2-5",
"5.0.2-5+deb12u1",
"5.0.2-5+deb12u2",
"5.0.2-5+deb12u3",
"5.0.2-5+deb12u4",
"5.0.2-5+deb12u5",
"5.0.2-5+deb12u6",
"5.0.2-6"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34177.json"
},
"ecosystem_specific": {
"urgency": "end-of-life"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.0.2+git20231211.1364ae4-9+deb13u5"
}
]
}
],
"package": {
"name": "lxd",
"purl": "pkg:deb/debian/lxd?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.0.2+git20231211.1364ae4-9",
"5.0.2+git20231211.1364ae4-9+deb13u1",
"5.0.2+git20231211.1364ae4-9+deb13u2",
"5.0.2+git20231211.1364ae4-9+deb13u3",
"5.0.2+git20231211.1364ae4-9+deb13u4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34177.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:30.847775657Z",
"provider": "osv",
"upstream": [
"CVE-2026-34177"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-34177"
]
},
"related_cves": [
{
"value": "CVE-2026-34177",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 460912,
"published_at": "2026-04-09T10:16:21.653+00:00"
}