{"id":"CVE-2026-3888","aliases":["DEBIAN-CVE-2026-3888","DSA-6170-1","EUVD-2026-12570","GHSA-grpw-jgrw-ccqr","UBUNTU-CVE-2026-3888","USN-8102-1","USN-8102-2"],"status":"published","title":"Local Privilege Escalation in snapd","description":"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.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01411,"percentile":0.73017,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-268"],"published":"2026-03-17T14:00:00Z","modified":"2026-10-28T02:30:35Z","exploits":[{"source":"metasploit","id":"exploit/linux/local/cve_2026_3888","title":"Local Privilege Escalation in snapd","type":"exploit","platform":"Linux","date":"2026-03-17","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/linux/local/cve_2026_3888"},{"source":"pocgithub","id":"fevar54/CVE-2026-3888-POC-all-from-the-Qualys-platform.","title":"fevar54/CVE-2026-3888-POC-all-from-the-Qualys-platform.","date":"2026-03-18","url":"https://github.com/fevar54/CVE-2026-3888-POC-all-from-the-Qualys-platform."},{"source":"pocgithub","id":"Many-Hat-Group/Ubuntu-CVE-2026-3888-patcher","title":"Many-Hat-Group/Ubuntu-CVE-2026-3888-patcher","date":"2026-03-19","url":"https://github.com/Many-Hat-Group/Ubuntu-CVE-2026-3888-patcher"},{"source":"pocgithub","id":"netw0rk7/CVE-2026-3888-PoC","title":"netw0rk7/CVE-2026-3888-PoC","date":"2026-03-20","url":"https://github.com/netw0rk7/CVE-2026-3888-PoC"},{"source":"pocgithub","id":"TheCyberGeek/CVE-2026-3888-snap-confine-systemd-tmpfiles-LPE","title":"TheCyberGeek/CVE-2026-3888-snap-confine-systemd-tmpfiles-LPE","date":"2026-03-23","url":"https://github.com/TheCyberGeek/CVE-2026-3888-snap-confine-systemd-tmpfiles-LPE"},{"source":"pocgithub","id":"noambouillet/CVE-2026-3888","title":"noambouillet/CVE-2026-3888","date":"2026-03-23","url":"https://github.com/noambouillet/CVE-2026-3888"},{"source":"pocgithub","id":"hewhomusntbenamed/CVE-2026-3888-fixed","title":"hewhomusntbenamed/CVE-2026-3888-fixed","date":"2026-05-12","url":"https://github.com/hewhomusntbenamed/CVE-2026-3888-fixed"},{"source":"pocgithub","id":"AlanNewberry/CVE-2026-3888-snap-confine-privilege-escalation","title":"AlanNewberry/CVE-2026-3888-snap-confine-privilege-escalation","date":"2026-10-06","url":"https://github.com/AlanNewberry/CVE-2026-3888-snap-confine-privilege-escalation"},{"source":"pocgithub","id":"alinpfan/CVE-2026-3888-PoC","title":"alinpfan/CVE-2026-3888-PoC","date":"2026-10-12","url":"https://github.com/alinpfan/CVE-2026-3888-PoC"}],"fixes":[{"ecosystem":"Debian:12","package":"snapd","fixed_in":["2.57.6-1+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"snapd","fixed_in":["2.68.3-3+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"snapd","fixed_in":["2.76-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"snapd","fixed_in":["2.61.4ubuntu0.16.04.1+esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"snapd","fixed_in":["2.61.4ubuntu0.18.04.1+esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"snapd","fixed_in":["2.67.1+20.04ubuntu1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"snapd","fixed_in":["2.73+ubuntu22.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"snapd","fixed_in":["2.73+ubuntu24.04.2","2.73+ubuntu24.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:25.10","package":"snapd","fixed_in":["2.73+ubuntu25.10.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"snapd","fixed_in":["2.74.1+ubuntu26.04.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.57.6-1+deb12u1"}]}],"versions":["2.57.6-1"]},{"source":"osv","ecosystem":"Debian:13","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.68.3-3+deb13u1"}]}],"versions":["2.68.3-3"]},{"source":"osv","ecosystem":"Debian:14","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.76-1"}]}],"versions":["2.68.3-3","2.71-1","2.71-2","2.71-3","2.72-1","2.73-3","2.73-4","2.74.1-1","2.75.2-1","2.75.2-2"]},{"source":"osv","ecosystem":"Debian:12","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.57.6-1+deb12u1"}]}],"versions":["2.57.6-1"]},{"source":"osv","ecosystem":"Debian:13","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.68.3-3+deb13u1"}]}],"versions":["2.68.3-3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.61.4ubuntu0.16.04.1+esm2"}]}],"versions":["1.9","1.9.1.1","1.9.2","2.0","2.0.1","2.0.2","2.0.3","2.0.5","2.0.8","2.0.9","2.0.10","2.11+0.16.04","2.12+0.16.04","2.13","2.14.2~16.04","2.15.2ubuntu1","2.16ubuntu3","2.17.1ubuntu1","2.20.1ubuntu1","2.21","2.22.2","2.22.3","2.22.6","2.23.1","2.24.1","2.25","2.26.10","2.27.5","2.28.5","2.29.4.2","2.32.3.2","2.32.9","2.33.1ubuntu2","2.34.2","2.34.2ubuntu0.1","2.37.4","2.37.4ubuntu0.1","2.38","2.39.2","2.39.2ubuntu0.2","2.40","2.42.1","2.45.1","2.45.1ubuntu0.2","2.46.1","2.47.1","2.48","2.48.3","2.54.3+16.04~esm2","2.54.3+16.04.0ubuntu0.1~esm3","2.54.3+16.04.0ubuntu0.1~esm4","2.54.3+16.04.0ubuntu0.1~esm5","2.54.3+16.04.0ubuntu0.1~esm6","2.61.4ubuntu0.16.04.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"snapd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.61.4ubuntu0.18.04.1+esm2"}]}],"versions":["2.28.5+17.10","2.29.4.1+18.04","2.29.4.2+18.04","2.31.1+18.04","2.32+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Privilege Escalation in snapd","description":"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.","status":"published","published":"2026-03-17T14:02:08.475Z","modified":"2026-03-18T08:59:07.522Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-268"],"updated_at":"2026-11-02T13:49:09.229322Z"}],"euvd":[{"id":"EUVD-2026-12570","description":"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.","status":"published","published":"2026-03-17T14:02:08Z","modified":"2026-03-18T08:59:07Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T19:25:33.306068Z"}],"ghsa":[{"id":"GHSA-grpw-jgrw-ccqr","title":"Local privilege escalation in snapd on Linux allows local attackers to get root privilege by re...","description":"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.","status":"published","published":"2026-03-17T15:36:23Z","modified":"2026-03-18T06:31:20Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-268"],"updated_at":"2026-11-02T15:06:41.700997Z"}],"nvd":[{"id":"CVE-2026-3888","description":"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.","status":"published","published":"2026-03-17T14:16:17.41Z","modified":"2026-06-17T10:44:23.017Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-268"],"updated_at":"2026-11-02T14:12:09.735529Z"}],"osv":[{"id":"CVE-2026-3888","title":"Local Privilege Escalation in snapd","description":"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.","status":"published","published":"2026-03-17T14:02:08.475Z","modified":"2026-10-28T02:30:35.817501361Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-268"],"updated_at":"2026-11-02T15:45:03.040464Z"},{"id":"DEBIAN-CVE-2026-3888","description":"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.","status":"published","published":"2026-03-17T14:16:17.41Z","modified":"2026-10-01T03:03:22.468514066Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:54.892385Z"},{"id":"UBUNTU-CVE-2026-3888","description":"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.","status":"published","published":"2026-03-17T14:00:00Z","modified":"2026-05-20T16:25:38.706743909Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:16.686388Z"},{"id":"DSA-6170-1","title":"snapd - security update","status":"published","published":"2026-03-19T00:00:00Z","modified":"2026-03-19T23:31:05.009701Z","updated_at":"2026-11-02T15:46:18.296714Z"},{"id":"USN-8102-1","title":"snapd vulnerability","description":"Qualys discovered that snapd incorrectly handled certain operations in the\nsnap's private /tmp directory. If systemd-tmpfiles is enabled to automatically\nclean up this directory, a local attacker could possibly use this issue to\nre-create the deleted directory, resulting in privilege escalation.","status":"published","published":"2026-03-17T14:21:34Z","modified":"2026-06-25T13:32:31.710184919Z","updated_at":"2026-11-02T16:58:22.951676Z"},{"id":"USN-8102-2","title":"snapd regression","description":"USN-8102-1 fixed a vulnerability in snapd. The update caused a regresision for\nUbuntu 24.04 LTS while installing the package. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\nQualys discovered that snapd incorrectly handled certain operations in the\nsnap's private /tmp directory. If systemd-tmpfiles is enabled to automatically\nclean up this directory, a local attacker could possibly use this issue to\nre-create the deleted directory, resulting in privilege escalation.\n","status":"published","published":"2026-03-17T22:33:11Z","modified":"2026-04-27T18:37:56.931547Z","updated_at":"2026-11-02T16:58:22.951676Z"}]}}