Bug 2448369 (CVE-2026-3888)

Summary: CVE-2026-3888 snapd: Local Privilege Escalation in snapd
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A privilege escalation flaw has been discovered in snapd. This local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2448405, 2448406    
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Description OSIDB Bzimport 2026-03-17 15:02:07 UTC
Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re-creating snap's private /tmp directory when systemd-tmpfiles is configured to automatically clean up this directory. This issue affects Ubuntu 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 24.04 LTS.