CVE-2026-15226

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.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15226.json",
    "cwe_ids": [
        "CWE-250"
    ],
    "cna_assigner": "canonical"
}

References

Affected packages

Git / github.com/canonical/snapd

Affected ranges

Type

GIT

Repo

https://github.com/canonical/snapd

Events

Introduced

Fixed

120ec00365ceab53039ab25863ef73539b5a1647

Database specific

{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.76.1"
        }
    ]
}

Affected versions

1.*

1.0-0ubuntu1

1.0.1-0ubuntu1

1.1-0ubuntu1

1.1.1-0ubuntu1

1.1.2-0ubuntu1

1.2-0ubuntu1

1.3ubuntu1

1.4ubuntu1

1.5ubuntu1

1.6ubuntu1

1.7.2+20160113ubuntu1

1.7.2+20160204ubuntu1

1.7.2+20160223ubuntu1

1.7.2ubuntu1

1.7.3+20160225ubuntu1

1.7.3+20160303ubuntu1

1.7.3+20160303ubuntu2

1.7.3+20160303ubuntu3

1.7.3+20160303ubuntu4

1.7.3+20160308ubuntu1

1.7.3+20160310ubuntu1

1.7ubuntu1

1.9

1.9.1

1.9.2

1.9.3

1.9.4

2.*

2.0

2.0.10

2.0.3

2.0.4

2.0.5

2.0.6

2.0.7

2.0.8

2.0.9

2.11

2.12

2.13

2.14

2.14.1

2.14.2.16.04

2.15

2.15.2

2.76

Other

ppa

untagged-ec50ee5bfb45daefc236

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15226.json"