ubuntu-cve-2026-15226
Vulnerability from osv_ubuntu
Published
2026-07-21 14:00
Modified
2026-07-21 21:01
Summary
Details
A sandbox confinement bypass vulnerability exists in Canonical snapd within its internal execution environment compiler (snap-confine). The default seccomp security templates generated by the engine to restrict system calls do not filter or reject process operations capable of creating or manipulating file execution flags with set-user-ID attributes. Consequently, an application running within a strictly confined snap environment can successfully compile or drop binaries and apply setuid properties to them. If a compromised or malicious process inside the snap sandbox executes these generated setuid binaries, it can potentially circumvent architectural sandboxing assumptions, drop intended restriction policies, or execute privileged actions inside the container namespace that should otherwise be strictly blocked. The vulnerability has been resolved by hardening the seccomp template engine to block the execution and creation of setuid executables by sandboxed snap processes.
Severity
8.4 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "snap-confine",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "snapd",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.61.4ubuntu0.16.04.1+esm4"
}
],
"priority_reason": "CVSS high"
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.61.4ubuntu0.16.04.1+esm4?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.61.4ubuntu0.16.04.1+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9",
"1.9.1.1",
"1.9.2",
"2.0",
"2.0.1",
"2.0.2",
"2.0.3",
"2.0.5",
"2.0.8",
"2.0.9",
"2.0.10",
"2.11+0.16.04",
"2.12+0.16.04",
"2.13",
"2.14.2~16.04",
"2.15.2ubuntu1",
"2.16ubuntu3",
"2.17.1ubuntu1",
"2.20.1ubuntu1",
"2.21",
"2.22.2",
"2.22.3",
"2.22.6",
"2.23.1",
"2.24.1",
"2.25",
"2.26.10",
"2.27.5",
"2.28.5",
"2.29.4.2",
"2.32.3.2",
"2.32.9",
"2.33.1ubuntu2",
"2.34.2",
"2.34.2ubuntu0.1",
"2.37.4",
"2.37.4ubuntu0.1",
"2.38",
"2.39.2",
"2.39.2ubuntu0.2",
"2.40",
"2.42.1",
"2.45.1",
"2.45.1ubuntu0.2",
"2.46.1",
"2.47.1",
"2.48",
"2.48.3",
"2.54.3+16.04~esm2",
"2.54.3+16.04.0ubuntu0.1~esm3",
"2.54.3+16.04.0ubuntu0.1~esm4",
"2.54.3+16.04.0ubuntu0.1~esm5",
"2.54.3+16.04.0ubuntu0.1~esm6",
"2.61.4ubuntu0.16.04.1+esm1",
"2.61.4ubuntu0.16.04.1+esm2"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "snap-confine",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "snapd",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.61.4ubuntu0.18.04.1+esm4"
}
],
"priority_reason": "CVSS high"
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.61.4ubuntu0.18.04.1+esm4?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.61.4ubuntu0.18.04.1+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.28.5+17.10",
"2.29.4.1+18.04",
"2.29.4.2+18.04",
"2.31.1+18.04",
"2.32+18.04~pre5",
"2.32+18.04~pre6",
"2.32+18.04",
"2.32.3.2+18.04",
"2.32.5+18.04",
"2.32.8+18.04",
"2.32.9+18.04",
"2.33.1+18.04ubuntu2",
"2.34.2+18.04",
"2.34.2+18.04.1",
"2.37.1+18.04",
"2.37.1.1+18.04",
"2.37.4+18.04",
"2.37.4+18.04.1",
"2.38+18.04",
"2.39.2+18.04",
"2.40+18.04",
"2.42.1+18.04",
"2.45.1+18.04",
"2.45.1+18.04.2",
"2.46.1+18.04",
"2.47.1+18.04",
"2.48+18.04",
"2.48.3+18.04",
"2.49.2+18.04",
"2.51.1+18.04",
"2.54.2+18.04ubuntu1",
"2.54.3+18.04",
"2.54.3+18.04.2ubuntu0.1",
"2.54.3+18.04.2ubuntu0.2",
"2.55.5+18.04",
"2.57.5+18.04",
"2.57.5+18.04ubuntu0.1",
"2.58+18.04",
"2.58+18.04.1",
"2.61.4ubuntu0.18.04.1+esm1",
"2.61.4ubuntu0.18.04.1+esm2"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "snap-confine",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "snapd",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.67.1+20.04ubuntu1~esm3"
}
],
"priority_reason": "CVSS high"
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.67.1+20.04ubuntu1~esm3?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.67.1+20.04ubuntu1~esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.41+19.10.1",
"2.42.1+20.04",
"2.43.3+git1.8109f8",
"2.44~pre1+20.04",
"2.44+20.04",
"2.44.2+20.04",
"2.44.3+20.04",
"2.45.1+20.04",
"2.45.1+20.04.2",
"2.46.1+20.04",
"2.47.1+20.04",
"2.48+20.04",
"2.48.3+20.04",
"2.49.2+20.04",
"2.51.1+20.04ubuntu2",
"2.54.2+20.04ubuntu2",
"2.54.3+20.04",
"2.54.3+20.04.1",
"2.54.3+20.04.1ubuntu0.1",
"2.54.3+20.04.1ubuntu0.2",
"2.54.3+20.04.1ubuntu0.3",
"2.55.5+20.04",
"2.57.5+20.04",
"2.57.5+20.04ubuntu0.1",
"2.58+20.04",
"2.58+20.04.1",
"2.61.3+20.04",
"2.62+20.04",
"2.63+20.04",
"2.63+20.04ubuntu0.1",
"2.65.3+20.04",
"2.66.1+20.04",
"2.67.1+20.04",
"2.67.1+20.04ubuntu1~esm1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "snap-confine",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "snapd",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.76+ubuntu22.04.1"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.76+ubuntu22.04.1"
}
],
"priority_reason": "CVSS high"
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu22.04.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.76+ubuntu22.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.53+21.10ubuntu1",
"2.54.2+22.04ubuntu1",
"2.54.2+22.04ubuntu2",
"2.54.2+22.04ubuntu3",
"2.54.3+git19.g868fc21+22.04",
"2.54.3+git26.g360067e+22.04",
"2.55.2+22.04",
"2.55.2+22.04.1",
"2.55.3+22.04",
"2.55.3+22.04ubuntu1",
"2.55.5+22.04",
"2.56.2+22.04ubuntu1",
"2.57.4+22.04",
"2.57.5+22.04",
"2.57.5+22.04ubuntu0.1",
"2.58+22.04",
"2.58+22.04.1",
"2.61.3+22.04",
"2.62+22.04",
"2.63+22.04",
"2.63+22.04ubuntu0.1",
"2.65.3+22.04",
"2.66.1+22.04",
"2.67.1+22.04",
"2.68.5+ubuntu22.04.1",
"2.71+ubuntu22.04",
"2.72+ubuntu22.04",
"2.73+ubuntu22.04",
"2.73+ubuntu22.04.1",
"2.74.1+ubuntu22.04.4",
"2.75.2+ubuntu22.04",
"2.76+ubuntu22.04"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "snap-confine",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "snapd",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.76+ubuntu24.04.1"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.76+ubuntu24.04.1"
}
],
"priority_reason": "CVSS high"
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu24.04.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.76+ubuntu24.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.60.4+23.10",
"2.61.3+24.04",
"2.62+24.04build1",
"2.63+24.04",
"2.63+24.04ubuntu0.1",
"2.63.1+24.04",
"2.65.3+24.04",
"2.66.1+24.04",
"2.67.1+24.04",
"2.68.5+ubuntu24.04.1",
"2.71+ubuntu24.04",
"2.72+ubuntu24.04",
"2.73+ubuntu24.04",
"2.73+ubuntu24.04.1",
"2.73+ubuntu24.04.2",
"2.74.1+ubuntu24.04.4",
"2.75.2+ubuntu24.04",
"2.76+ubuntu24.04"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.76+ubuntu26.04.3"
},
{
"binary_name": "snapd",
"binary_version": "2.76+ubuntu26.04.3"
}
],
"priority_reason": "CVSS high"
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.76+ubuntu26.04.3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.76+ubuntu26.04.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.71.1+ubuntu25.10.1",
"2.72+ubuntu26.04.1",
"2.73+ubuntu26.04.1",
"2.74+ubuntu26.04",
"2.74.1+ubuntu26.04",
"2.74.1+ubuntu26.04.3",
"2.74.1+ubuntu26.04.4",
"2.75.2+ubuntu26.04.2",
"2.76+ubuntu26.04.2"
]
}
],
"aliases": [],
"details": "A sandbox confinement bypass vulnerability exists in Canonical snapd within its internal execution environment compiler (snap-confine). The default seccomp security templates generated by the engine to restrict system calls do not filter or reject process operations capable of creating or manipulating file execution flags with set-user-ID attributes. Consequently, an application running within a strictly confined snap environment can successfully compile or drop binaries and apply setuid properties to them. If a compromised or malicious process inside the snap sandbox executes these generated setuid binaries, it can potentially circumvent architectural sandboxing assumptions, drop intended restriction policies, or execute privileged actions inside the container namespace that should otherwise be strictly blocked. The vulnerability has been resolved by hardening the seccomp template engine to block the execution and creation of setuid executables by sandboxed snap processes.",
"id": "UBUNTU-CVE-2026-15226",
"modified": "2026-07-21T21:01:23Z",
"published": "2026-07-21T14:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-15226"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-15226"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8579-1"
}
],
"related": [
"USN-8579-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-15226"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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