CVE-2026-15226
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Ubuntu Fixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| xenial | Fixed | 2.61.4ubuntu0.16.04.1+esm4 |
| resolute | Fixed | 2.76+ubuntu26.04.3 |
| noble | Fixed | 2.76+ubuntu24.04.1 |
| jammy | Fixed | 2.76+ubuntu22.04.1 |
| focal | Fixed | 2.67.1+20.04ubuntu1~esm3 |
| bionic | Fixed | 2.61.4ubuntu0.18.04.1+esm4 |
References
CWEs
CWE-250
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.