TI-2026-07850 Aliases CVE-2026-8933 GHSA-fxqr-j4gx-622c

snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup

LOW 35CWE-250Published 2026-07-21 · Updated 2026-07-22

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Privilege escalation
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-250.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00178 7th percentileScored 2026-11-07

Fix Fixed snapd: 2.76.1Ubuntu 26.04 LTS (Canonical): 2.76+ubuntu26.04.3+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	snapd	2.75.0 to before 2.76.1	2.76.1	Patch available	CNA
Canonical	Ubuntu 26.04 LTS	—	2.76+ubuntu26.04.3	Patch available	CNA
Canonical	Ubuntu 24.04 LTS	—	2.76+ubuntu24.04.1	Patch available	CNA
Canonical	Ubuntu 22.04 LTS	—	2.76+ubuntu22.04.1	Patch available	CNA

snapd Vendor— Affected 2.75.0 to before 2.76.1 Fixed in 2.76.1 Patch available CNA
Ubuntu 26.04 LTS VendorCanonical Affected — Fixed in 2.76+ubuntu26.04.3 Patch available CNA
Ubuntu 24.04 LTS VendorCanonical Affected — Fixed in 2.76+ubuntu24.04.1 Patch available CNA
Ubuntu 22.04 LTS VendorCanonical Affected — Fixed in 2.76+ubuntu22.04.1 Patch available CNA

Remediation

Fix · CNA snapd Fixed in 2.76.1
Fix · CNA Ubuntu 26.04 LTS (Canonical) Fixed in 2.76+ubuntu26.04.3
Fix · CNA Ubuntu 24.04 LTS (Canonical) Fixed in 2.76+ubuntu24.04.1
Fix · CNA Ubuntu 22.04 LTS (Canonical) Fixed in 2.76+ubuntu22.04.1

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-8933
2026-10-03 Alias added: GHSA-fxqr-j4gx-622c

References

Other 1

https://ubuntu.com/security/CVE-2026-8933

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Sources

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