CVE-2026-3888

highpriority · track · 10EPSS 0.014 · 72 %ileexploit · weaponizedDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

10 exploits · weaponized

Likely / severe?

1.38% (72nd) EPSS

CVSS 7.8 · high

Is it mine?

32 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highAV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · security@ubuntu.comexploitability 1.1 · impact 6

v3.17.6highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:Fsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-268USCWE-268US

exploits (10)

Public proof-of-concept and weaponised exploit code.

exploit/linux/local/cve_2026_3888Local Privilege Escalation in snapdweaponized · metasploit
AlanNewberry/CVE-2026-3888-snap-confine-privilege-escalationExploit para CVE-2026-3888: race condition en snap-confine con hijack del loader para escalar a root en Linux.PoC · poc_in_github
DanielTangnes/CVE-2026-3888DanielTangnes/CVE-2026-3888PoC · poc_in_github
Many-Hat-Group/Ubuntu-CVE-2026-3888-patcherThis is a script designed for deployment on ubuntu instances patching the CVE-2026-3888 exploit PoC · poc_in_github
TheCyberGeek/CVE-2026-3888-snap-confine-systemd-tmpfiles-LPETheCyberGeek/CVE-2026-3888-snap-confine-systemd-tmpfiles-LPEPoC · poc_in_github
alinpfan/CVE-2026-3888-PoCCVE-2026-3888 PoC; discovered by the Qualys Threat Research Unit (TRU).PoC · poc_in_github

affected products (32)

Products and version ranges known to be affected.

Canonical Snapall versionscert_bundDEcpe:/a:canonical:snapd:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Ubuntu Linux snapd <2.61.4ubuntu0.16.04.1+esm2all versionscert_bundDE
Ubuntu Linux snapd <2.61.4ubuntu0.18.04.1+esm2all versionscert_bundDE
Ubuntu Linux snapd <2.67.1+20.04ubuntu1~esm1all versionscert_bundDE
Ubuntu Linux snapd <2.73+ubuntu22.04.1all versionscert_bundDE
Ubuntu Linux snapd <2.73+ubuntu24.04.1all versionscert_bundDE
Ubuntu Linux snapd <2.73+ubuntu25.10.1all versionscert_bundDE
Ubuntu Linux≤ snapd <2.61.4ubuntu0.18.04.1+esm2cert_bundDE
Ubuntu Linux≤ snapd <2.61.4ubuntu0.16.04.1+esm2cert_bundDE
Ubuntu Linux≤ snapd <2.67.1+20.04ubuntu1~esm1cert_bundDE
Ubuntu Linux≤ snapd <2.73+ubuntu22.04.1cert_bundDE
Ubuntu Linux≤ snapd <2.73+ubuntu24.04.1cert_bundDE
Ubuntu Linux≤ snapd <2.73+ubuntu25.10.1cert_bundDE
Canonical Ubuntu 16.04 LTS< 2.61.4ubuntu0.16.04.1+esm2enisa_euvdEU
Canonical Ubuntu 18.04 LTS< 2.61.4ubuntu0.18.04.1+esm2enisa_euvdEU
Canonical Ubuntu 20.04 LTS< 2.67.1+20.04ubuntu1~esm1enisa_euvdEU
Canonical Ubuntu 22.04 LTS< 2.73+ubuntu22.04.1enisa_euvdEU
Canonical Ubuntu 24.04 LTS< 2.73+ubuntu24.04.2enisa_euvdEU

showing 20 of 32

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0758Canonical Snap: Schwachstelle ermöglicht Erlangen von AdministratorrechtenDeutsch2026-03-17csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in Canonical Snap ausnutzen, um Administratorrechte zu erlangen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2026-03-17modified 2026-06-17

references (14)

External citations — patches, advisories, analysis.

scry

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