DEBIAN-CVE-2026-23953
Incus is a system container and virtual machine manager. In versions 6.20.0 and below, a user with the ability to launch a container with a custom YAML configuration (e.g a member of the ‘incus’ group) can create an environment variable containing newlines, which can be used to add additional configuration items in the container’s lxc.conf due to newline injection. This can allow adding arbitrary lifecycle hooks, ultimately resulting in arbitrary command execution on the host. Exploiting this issue on IncusOS requires a slight modification of the payload to change to a different writable directory for the validation step (e.g /tmp). This can be confirmed with a second container with /tmp mounted from the host (A privileged action for validation only). A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication.
DEBIAN-CVE-2026-23953
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-2026-23953
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+deb13u4~bpo12+1Source 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/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/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/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/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-2026-23953.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-2026-23953.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-2026-23953.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-2026-23953.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57447 · Revision 1
- Added to Heist Feed
- Publisher date