MediumFix available
incus, lxd — security advisory
Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage volume import logic allows an authenticated user with access to the storage volume feature to cause the Incus daemon to crash. The backup restore subsystem contains an out-of-bounds panic vulnerability caused by an invalid bounds check when indexing snapshot metadata arrays, and the same flawed pattern also appears in the migration path. When iterating through physical snapshots provided in a backup archive, the loop uses the index to look up corresponding metadata in the parsed `Config.Snapshots` and `Config.VolumeSnapshots` slices. The guard condition `len(slice) >= i-1` is incorrect because it can still evaluate to true when the subsequent slice[i] access is out of bounds. An attacker can submit a backup archive that contains physical snapshot directories while supplying a tampered `index.yaml` with an empty or truncated snapshot metadata array, causing the daemon to index beyond the end of the metadata slice and crash. Repeated use of this issue can be used to keep Incus offline, causing a denial of service. This issue is fixed in version 7.0.0.
- 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+git20231211.1364ae4-9+deb13u5, 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, 6.0.4-2, 6.0.4-2+deb13u1, 6.0.4-2+deb13u1~bpo12+1, 6.0.4-2+deb13u2, 6.0.4-2+deb13u2~bpo12+1, 6.0.4-2+deb13u3, 6.0.4-2+deb13u3~bpo12+1, 6.0.4-2+deb13u4, 6.0.4-2+deb13u4~bpo12+1, 6.0.4-2+deb13u5, 6.0.4-2+deb13u5~bpo12+1, 6.0.4-2+deb13u6, 6.0.4-2+deb13u6~bpo12+1, 6.0.4-2+deb13u7~bpo12+1, 6.0.4-3, 6.0.5-1, 6.0.5-2, 6.0.5-3, 6.0.5-4, 6.0.5-5, 6.0.5-6, 6.0.5-7, 6.0.5-8, 6.0.6-1, 6.0.6-2, 6.0.6-3, 6.14.0-1~exp1, 6.15.0-1~exp1, 6.16.0-1~exp1, 6.17.0-1~exp1, 6.20.0-1~exp1, 6.21.0-1~exp1, 6.22.0-1~exp1, 6.23.0-1~exp1, 7.0.0-1~bpo13+1
- Fixed versions
- 5.0.2+git20231211.1364ae4-9+deb13u6, 6.0.4-2+deb13u7, 7.0.0-1
- CVEs
- CVE-2026-40251
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:38 UTC · Revision 2
Source evidence
Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage volume import logic allows an authenticated user with access to the storage volume feature to cause the Incus daemon to crash. The backup restore subsystem contains an out-of-bounds panic vulnerability caused by an invalid bounds check when indexing snapshot metadata arrays, and the same flawed pattern also appears in the migration path. When iterating through physical snapshots provided in a backup archive, the loop uses the index to look up corresponding metadata in the parsed `Config.Snapshots` and `Config.VolumeSnapshots` slices. The guard condition `len(slice) >= i-1` is incorrect because it can still evaluate to true when the subsequent slice[i] access is out of bounds. An attacker can submit a backup archive that contains physical snapshot directories while supplying a tampered `index.yaml` with an empty or truncated snapshot metadata array, causing the daemon to index beyond the end of the metadata slice and crash. Repeated use of this issue can be used to keep Incus offline, causing a denial of service. This issue is fixed in version 7.0.0.
osv:DEBIAN-CVE-2026-40251
incus
Fixed versions: 6.0.4-2+deb13u7
incus
Fixed versions: 7.0.0-1
lxd
Fixed versions: Not specified
lxd
Fixed versions: 5.0.2+git20231211.1364ae4-9+deb13u6
Complete source record
{
"id": "1e4073bd19995fe1c4a5d73c1ee942644e60bb3a70112a1762e9f680e89b0219",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-40251",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-40251",
"summary": "Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage volume import logic allows an authenticated user with access to the storage volume feature to cause the Incus daemon to crash. The backup restore subsystem contains an out-of-bounds panic vulnerability caused by an invalid bounds check when indexing snapshot metadata arrays, and the same flawed pattern also appears in the migration path. When iterating through physical snapshots provided in a backup archive, the loop uses the index to look up corresponding metadata in the parsed `Config.Snapshots` and `Config.VolumeSnapshots` slices. The guard condition `len(slice) >= i-1` is incorrect because it can still evaluate to true when the subsequent slice[i] access is out of bounds. An attacker can submit a backup archive that contains physical snapshot directories while supplying a tampered `index.yaml` with an empty or truncated snapshot metadata array, causing the daemon to index beyond the end of the metadata slice and crash. Repeated use of this issue can be used to keep Incus offline, causing a denial of service. This issue is fixed in version 7.0.0.",
"evidence": "osv:DEBIAN-CVE-2026-40251",
"products": [
{
"name": {
"value": "incus",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.0.4-2+deb13u7",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "6.0.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u1~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u2",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u2~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u3",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u3~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u4",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u4~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u5",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u5~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u6",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u6~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "6.0.4-2+deb13u7~bpo12+1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "incus",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.0-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "6.0.4-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.4-3",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-3",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-4",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-5",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-6",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-7",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.5-8",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.6-2",
"evidence": "/affected/1/versions"
},
{
"value": "6.0.6-3",
"evidence": "/affected/1/versions"
},
{
"value": "6.14.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "6.15.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "6.16.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "6.17.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "6.20.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "6.21.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "6.22.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "6.23.0-1~exp1",
"evidence": "/affected/1/versions"
},
{
"value": "7.0.0-1~bpo13+1",
"evidence": "/affected/1/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+deb13u6",
"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"
},
{
"value": "5.0.2+git20231211.1364ae4-9+deb13u5",
"evidence": "/affected/3/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-40251",
"aliases": [
"DEBIAN-CVE-2026-40251"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.4-2+deb13u7"
}
]
}
],
"package": {
"name": "incus",
"purl": "pkg:deb/debian/incus?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.0.4-2",
"6.0.4-2+deb13u1",
"6.0.4-2+deb13u1~bpo12+1",
"6.0.4-2+deb13u2",
"6.0.4-2+deb13u2~bpo12+1",
"6.0.4-2+deb13u3",
"6.0.4-2+deb13u3~bpo12+1",
"6.0.4-2+deb13u4",
"6.0.4-2+deb13u4~bpo12+1",
"6.0.4-2+deb13u5",
"6.0.4-2+deb13u5~bpo12+1",
"6.0.4-2+deb13u6",
"6.0.4-2+deb13u6~bpo12+1",
"6.0.4-2+deb13u7~bpo12+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40251.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.0-1"
}
]
}
],
"package": {
"name": "incus",
"purl": "pkg:deb/debian/incus?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.0.4-2",
"6.0.4-3",
"6.0.5-1",
"6.0.5-2",
"6.0.5-3",
"6.0.5-4",
"6.0.5-5",
"6.0.5-6",
"6.0.5-7",
"6.0.5-8",
"6.0.6-1",
"6.0.6-2",
"6.0.6-3",
"6.14.0-1~exp1",
"6.15.0-1~exp1",
"6.16.0-1~exp1",
"6.17.0-1~exp1",
"6.20.0-1~exp1",
"6.21.0-1~exp1",
"6.22.0-1~exp1",
"6.23.0-1~exp1",
"7.0.0-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40251.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-2026-40251.json"
},
"ecosystem_specific": {
"urgency": "end-of-life"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.0.2+git20231211.1364ae4-9+deb13u6"
}
]
}
],
"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",
"5.0.2+git20231211.1364ae4-9+deb13u5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40251.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:30.490262823Z",
"provider": "osv",
"upstream": [
"CVE-2026-40251"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-40251"
]
},
"related_cves": [
{
"value": "CVE-2026-40251",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 460939,
"published_at": "2026-05-06T21:16:01.21+00:00"
}