UnratedFix available

DEBIAN-CVE-2026-23954

Type: advisorySource: OSV1 source record

Incus is a system container and virtual machine manager. Versions 6.21.0 and below allow a user with the ability to launch a container with a custom image (e.g a member of the ‘incus’ group) to use directory traversal or symbolic links in the templating functionality to achieve host arbitrary file read, and host arbitrary file write. This ultimately results in arbitrary command execution on the host. When using an image with a metadata.yaml containing templates, both the source and target paths are not checked for symbolic links or directory traversal. This can also be exploited in IncusOS. A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication.

Announced 22 Jan 2026Source revision 1

Original source ↗

DEBIAN-CVE-2026-23954

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-2026-23954

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~bpo12+1
Source reference: /affected/0/versions
Fixed versions: 6.0.4-2+deb13u4
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
Fixed versions: 6.0.5-8
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
Fixed versions: 5.0.2+git20231211.1364ae4-9+deb13u3
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+deb13u4"
          }
        ]
      }
    ],
    "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~bpo12+1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23954.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "6.0.5-8"
          }
        ]
      }
    ],
    "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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23954.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-2026-23954.json"
    },
    "ecosystem_specific": {
      "urgency": "end-of-life"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "5.0.2+git20231211.1364ae4-9+deb13u3"
          }
        ]
      }
    ],
    "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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23954.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57449 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:15:56 GMT
Publisher date: Thu, 22 Jan 2026 22:16:20 GMT

Read the original announcement