CVE-2026-8933 (GCVE-0-2026-8933)

Vulnerability from cvelistv5 – Published: 2026-07-21 14:02 – Updated: 2026-07-21 14:02
VLAI
Title
snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-250 - Execution with unnecessary privileges
Assigner
References
URL Tags
https://ubuntu.com/security/CVE-2026-8933 vdb-entryissue-tracking
Impacted products
Vendor Product Version
Affected: 2.75.0 , < 2.76.1 (semver)
Canonical Ubuntu 26.04 LTS Unaffected: 2.76+ubuntu26.04.3 (dpkg)
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Canonical Ubuntu 24.04 LTS Unaffected: 2.76+ubuntu24.04.1 (dpkg)
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Canonical Ubuntu 22.04 LTS Unaffected: 2.76+ubuntu22.04.1 (dpkg)
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Date Public
2026-07-21 02:00
Credits
Qualys Security Advisory Team
Show details on NVD website
To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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