---
title: "CVE-2026-8933\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-8933?format=md
keywords: index, follow
---

# CVE-2026-8933

Publication date 21 July 2026

Last updated 6 August 2026

---

Ubuntu priority

**High**

[Why this priority?](https://ubuntu.com/security/CVE-2026-8933?format=md#priority-reason )

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2026-8933?format=md#impact-score)

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## Description

A local privilege escalation vulnerability exists in snap-confine, a
set-capabilities core component used internally by Canonical snapd to
construct the secure execution environment for snap applications. This
vulnerability uniquely affects versions of snap-confine configured with
set-capabilities (rather than standard set-uid-root installations).
Due to a flaw in how privilege boundaries or security sandboxes are
initialized when the binary runs under limited ambient capabilities, a
local, unprivileged attacker can exploit this behavior to bypass intended
restrictions and execute arbitrary code. Successful exploitation allows the
local user to elevate their privileges to full root authority.

### Why is this CVE high priority?

Local Privilege Escalation

[Learn more about Ubuntu priority](https://ubuntu.com/security/cves/about#priority)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| snapd | 26.04 LTS resolute | Fixed 2.76+ubuntu26.04.3 |
| 24.04 LTS noble | Fixed 2.76+ubuntu24.04.1 |
| 22.04 LTS jammy | Fixed 2.76+ubuntu22.04.1 |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.8 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-8933)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-8933)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-8933)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-8933)

### Related Ubuntu Security Notices (USN)

+ [USN-8579-1](https://usn.ubuntu.com/USN-8579-1)
+ snapd vulnerabilities
+ 21 July 2026

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-8933>