CVE-2026-8933snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup
Updated under an hour ago ()
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It affects Canonical Ubuntu 26.04 LTS and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-250
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- canonical
- NVD analysis
- Awaiting Analysis
- Record last updated
- Jul 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Canonical Ubuntu 26.04 LTS canonical:ubuntu_26.04_lts (from the name) | 2.76+ubuntu26.04.3 not affected | CNA record |
Canonical Ubuntu 24.04 LTS canonical:ubuntu_24.04_lts (from the name) | 2.76+ubuntu24.04.1 not affected | CNA record |
Canonical Ubuntu 22.04 LTS canonical:ubuntu_22.04_lts (from the name) | 2.76+ubuntu22.04.1 not affected | CNA record |
References
- https://ubuntu.com/security/CVE-2026-8933vdb-entry, issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.