DEBIAN-CVE-2026-40251
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.
DEBIAN-CVE-2026-40251
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-40251
incus
Source reference: /affected/0/package/name
- Affected versions
- 6.0.4-2
Source reference:
/affected/0/versions6.0.4-2+deb13u1Source reference:
/affected/0/versions6.0.4-2+deb13u1~bpo12+1Source reference:
/affected/0/versions6.0.4-2+deb13u2Source reference:
/affected/0/versions6.0.4-2+deb13u2~bpo12+1Source reference:
/affected/0/versions6.0.4-2+deb13u3Source reference:
/affected/0/versions6.0.4-2+deb13u3~bpo12+1Source reference:
/affected/0/versions6.0.4-2+deb13u4Source reference:
/affected/0/versions6.0.4-2+deb13u4~bpo12+1Source reference:
/affected/0/versions6.0.4-2+deb13u5Source reference:
/affected/0/versions6.0.4-2+deb13u5~bpo12+1Source reference:
/affected/0/versions6.0.4-2+deb13u6Source reference:
/affected/0/versions6.0.4-2+deb13u6~bpo12+1Source reference:
/affected/0/versions6.0.4-2+deb13u7~bpo12+1Source reference:
/affected/0/versions - Fixed versions
- 6.0.4-2+deb13u7
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
incus
Source reference: /affected/1/package/name
- Affected versions
- 6.0.4-2
Source reference:
/affected/1/versions6.0.4-3Source reference:
/affected/1/versions6.0.5-1Source reference:
/affected/1/versions6.0.5-2Source reference:
/affected/1/versions6.0.5-3Source reference:
/affected/1/versions6.0.5-4Source reference:
/affected/1/versions6.0.5-5Source reference:
/affected/1/versions6.0.5-6Source reference:
/affected/1/versions6.0.5-7Source reference:
/affected/1/versions6.0.5-8Source reference:
/affected/1/versions6.0.6-1Source reference:
/affected/1/versions6.0.6-2Source reference:
/affected/1/versions6.0.6-3Source reference:
/affected/1/versions6.14.0-1~exp1Source reference:
/affected/1/versions6.15.0-1~exp1Source reference:
/affected/1/versions6.16.0-1~exp1Source reference:
/affected/1/versions6.17.0-1~exp1Source reference:
/affected/1/versions6.20.0-1~exp1Source reference:
/affected/1/versions6.21.0-1~exp1Source reference:
/affected/1/versions6.22.0-1~exp1Source reference:
/affected/1/versions6.23.0-1~exp1Source reference:
/affected/1/versions7.0.0-1~bpo13+1Source reference:
/affected/1/versions - Fixed versions
- 7.0.0-1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
lxd
Source reference: /affected/2/package/name
- Affected versions
- 5.0.2+git20231211.1364ae4-1
Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-2Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-3Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-4Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-5Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-6Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-7Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-8Source reference:
/affected/2/versions5.0.2+git20231211.1364ae4-9Source reference:
/affected/2/versions5.0.2-5Source reference:
/affected/2/versions5.0.2-5+deb12u1Source reference:
/affected/2/versions5.0.2-5+deb12u2Source reference:
/affected/2/versions5.0.2-5+deb12u3Source reference:
/affected/2/versions5.0.2-5+deb12u4Source reference:
/affected/2/versions5.0.2-5+deb12u5Source reference:
/affected/2/versions5.0.2-5+deb12u6Source reference:
/affected/2/versions5.0.2-6Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lxd
Source reference: /affected/3/package/name
- Affected versions
- 5.0.2+git20231211.1364ae4-9
Source reference:
/affected/3/versions5.0.2+git20231211.1364ae4-9+deb13u1Source reference:
/affected/3/versions5.0.2+git20231211.1364ae4-9+deb13u2Source reference:
/affected/3/versions5.0.2+git20231211.1364ae4-9+deb13u3Source reference:
/affected/3/versions5.0.2+git20231211.1364ae4-9+deb13u4Source reference:
/affected/3/versions5.0.2+git20231211.1364ae4-9+deb13u5Source reference:
/affected/3/versions - Fixed versions
- 5.0.2+git20231211.1364ae4-9+deb13u6
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"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"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57600 · Revision 1
- Added to Heist Feed
- Publisher date