CVE-2026-15226

Published Jul 21, 2026

Last updated 3 months ago

CVSS high 8.4
Ubuntu

Overview

Description
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.
Source
security@ubuntu.com
NVD status
Awaiting Analysis

Risk scores

CVSS 3.1

Type
Secondary
Base score
8.4
Impact score
5.8
Exploitability score
2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Severity
HIGH

Weaknesses

security@ubuntu.com
CWE-250

Social media

Hype score
Not currently trending

  1. 🔒💥 ¡ALERTA DE SEGURIDAD EN UBUNTU! Canonical revela 3 vulnerabilidades críticas en snapd que afectan versiones desde Ubuntu 16.04 LTS. CVE-2026-8933 permite escalado de privilegios. CVE-2026-15226 posibilita escape de confinación. CVE-2024-5300 expone contraseñas

    @DiarioBitcoin

    23 Jul 2026

    932 Impressions

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References

Sources include official advisories and independent security research.