UnratedFix available

DEBIAN-CVE-2026-40251

Type: advisorySource: OSV1 source record

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.

Announced 6 May 2026Source revision 1

Original source ↗

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/versions
6.0.4-2+deb13u1
Source reference: /affected/0/versions
6.0.4-2+deb13u1~bpo12+1
Source reference: /affected/0/versions
6.0.4-2+deb13u2
Source reference: /affected/0/versions
6.0.4-2+deb13u2~bpo12+1
Source reference: /affected/0/versions
6.0.4-2+deb13u3
Source reference: /affected/0/versions
6.0.4-2+deb13u3~bpo12+1
Source reference: /affected/0/versions
6.0.4-2+deb13u4
Source reference: /affected/0/versions
6.0.4-2+deb13u4~bpo12+1
Source reference: /affected/0/versions
6.0.4-2+deb13u5
Source reference: /affected/0/versions
6.0.4-2+deb13u5~bpo12+1
Source reference: /affected/0/versions
6.0.4-2+deb13u6
Source reference: /affected/0/versions
6.0.4-2+deb13u6~bpo12+1
Source reference: /affected/0/versions
6.0.4-2+deb13u7~bpo12+1
Source 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/versions
6.0.4-3
Source reference: /affected/1/versions
6.0.5-1
Source reference: /affected/1/versions
6.0.5-2
Source reference: /affected/1/versions
6.0.5-3
Source reference: /affected/1/versions
6.0.5-4
Source reference: /affected/1/versions
6.0.5-5
Source reference: /affected/1/versions
6.0.5-6
Source reference: /affected/1/versions
6.0.5-7
Source reference: /affected/1/versions
6.0.5-8
Source reference: /affected/1/versions
6.0.6-1
Source reference: /affected/1/versions
6.0.6-2
Source reference: /affected/1/versions
6.0.6-3
Source reference: /affected/1/versions
6.14.0-1~exp1
Source reference: /affected/1/versions
6.15.0-1~exp1
Source reference: /affected/1/versions
6.16.0-1~exp1
Source reference: /affected/1/versions
6.17.0-1~exp1
Source reference: /affected/1/versions
6.20.0-1~exp1
Source reference: /affected/1/versions
6.21.0-1~exp1
Source reference: /affected/1/versions
6.22.0-1~exp1
Source reference: /affected/1/versions
6.23.0-1~exp1
Source reference: /affected/1/versions
7.0.0-1~bpo13+1
Source 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/versions
5.0.2+git20231211.1364ae4-2
Source reference: /affected/2/versions
5.0.2+git20231211.1364ae4-3
Source reference: /affected/2/versions
5.0.2+git20231211.1364ae4-4
Source reference: /affected/2/versions
5.0.2+git20231211.1364ae4-5
Source reference: /affected/2/versions
5.0.2+git20231211.1364ae4-6
Source reference: /affected/2/versions
5.0.2+git20231211.1364ae4-7
Source reference: /affected/2/versions
5.0.2+git20231211.1364ae4-8
Source reference: /affected/2/versions
5.0.2+git20231211.1364ae4-9
Source reference: /affected/2/versions
5.0.2-5
Source reference: /affected/2/versions
5.0.2-5+deb12u1
Source reference: /affected/2/versions
5.0.2-5+deb12u2
Source reference: /affected/2/versions
5.0.2-5+deb12u3
Source reference: /affected/2/versions
5.0.2-5+deb12u4
Source reference: /affected/2/versions
5.0.2-5+deb12u5
Source reference: /affected/2/versions
5.0.2-5+deb12u6
Source reference: /affected/2/versions
5.0.2-6
Source 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/versions
5.0.2+git20231211.1364ae4-9+deb13u1
Source reference: /affected/3/versions
5.0.2+git20231211.1364ae4-9+deb13u2
Source reference: /affected/3/versions
5.0.2+git20231211.1364ae4-9+deb13u3
Source reference: /affected/3/versions
5.0.2+git20231211.1364ae4-9+deb13u4
Source reference: /affected/3/versions
5.0.2+git20231211.1364ae4-9+deb13u5
Source 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: Sun, 25 Oct 2026 17:21:22 GMT
Publisher date: Wed, 06 May 2026 21:16:01 GMT

Read the original announcement