VDB
CVE-2026-3888
CVE-2026-3888
PUBLISHED
CVSS 7.800000190734863 HIGH
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.
EPSS 0.01% · 0.8th percentile
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score
0.01%
0.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| 0, 0, 0 | ||
| Canonical | Ubuntu 20.04 LTS | 2.67.1+20.04ubuntu1~esm1, 2.67.1+20.04ubuntu1~esm1, 2.67.1+20.04ubuntu1~esm1 |
| Canonical | Ubuntu 24.04 LTS | 2.73+ubuntu24.04.2, 2.73+ubuntu24.04.2, 2.73+ubuntu24.04.2 |
| Canonical | Ubuntu 18.04 LTS | 2.61.4ubuntu0.18.04.1+esm2, 2.61.4ubuntu0.18.04.1+esm2, * |
| Canonical | Ubuntu 22.04 LTS | 2.73+ubuntu22.04.1, 2.73+ubuntu22.04.1, 2.73+ubuntu22.04.1 |
| Canonical | Ubuntu 16.04 LTS | *, *, 2.61.4ubuntu0.16.04.1+esm2 |
Exploit Intelligence
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc-repo)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc-repo)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc-repo)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc-repo)
- CVE-2026-3888 — snap-confine / systemd-tmpfiles SUID LPE (fixed race_pid.txt issue) (github-poc-repo)
- Linux LPE via snap-confine + systemd-tmpfiles, explained in depth (github-poc-repo)
…and 184 more exploits
Timeline
- Mar 17, 2026 CVE Published
- Mar 17, 2026 PoC Published
- Mar 17, 2026 PoC Published
- Mar 17, 2026 PoC Published
- Mar 17, 2026 PoC Published
- Mar 17, 2026 PoC Published
- Mar 17, 2026 PoC Published
- Mar 18, 2026 EPSS Score
- Mar 18, 2026 Distribution Patch
- Mar 18, 2026 Security Advisory
- Mar 18, 2026 PoC Published
- Mar 18, 2026 PoC Published
References
- https://ubuntu.com/security/CVE-2026-3888 url
- https://ubuntu.com/security/notices/USN-8102-1 vendor-advisory
- https://discourse.ubuntu.com/t/snapd-local-privilege-escalation-cve-2026-3888 vendor-advisory
- https://blog.qualys.com/vulnerabilities-threat-research/2026/03/17/cve-2026-3888-important-snap-flaw-enables-local-privilege-escalation-to-root url
- https://cdn2.qualys.com/advisory/2026/03/17/snap-confine-systemd-tmpfiles.txt url
- http://www.openwall.com/lists/oss-security/2026/03/18/1 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-3888 advisory