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CVE-2026-3888
7.8 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Local (L)
- Attack Complexity (AC): High (H)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Changed (C)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Local (L)
- Modified Attack Complexity (MAC): High (H)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Changed (C)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): High (H)
Activity log
- Created suggestion
Local Privilege Escalation in snapd
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.
References
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https://ubuntu.com/security/notices/USN-8102-1 vendor-advisory
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https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888 technical-descriptionvendor-advisory
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https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-388… media-coveragetechnical-description
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https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt media-coveragetechnical-description
Affected products
snapd
- <2.75.1
- *