{"id":224893,"date":"2026-03-18T04:08:00","date_gmt":"2026-03-18T08:08:00","guid":{"rendered":"https:\/\/news-you-need.com\/index.php\/2026\/03\/18\/ubuntu-cve-2026-3888-bug-lets-attackers-gain-root-via-systemd-cleanup-timing-exploit\/"},"modified":"2026-03-18T06:40:11","modified_gmt":"2026-03-18T10:40:11","slug":"ubuntu-cve-2026-3888-bug-lets-attackers-gain-root-via-systemd-cleanup-timing-exploit","status":"publish","type":"post","link":"https:\/\/news-you-need.com\/index.php\/2026\/03\/18\/ubuntu-cve-2026-3888-bug-lets-attackers-gain-root-via-systemd-cleanup-timing-exploit\/","title":{"rendered":"Ubuntu CVE-2026-3888 Bug Lets Attackers Gain Root via systemd Cleanup Timing Exploit"},"content":{"rendered":"<p><a href=\"https:\/\/thehackernews.com\/2026\/03\/ubuntu-cve-2026-3888-bug-lets-attackers.html\">Ubuntu CVE-2026-3888 Bug Lets Attackers Gain Root via systemd Cleanup Timing Exploit<\/a><\/p>\n<p><a href=\"https:\/\/thehackernews.com\/2026\/03\/ubuntu-cve-2026-3888-bug-lets-attackers.html\">https:\/\/thehackernews.com\/2026\/03\/ubuntu-cve-2026-3888-bug-lets-attackers.html<\/a><\/p>\n<p>Publish Date: <a href=\"publish_date]\">2026-03-18 04:08:00<\/a><\/p>\n<p>Source Domain: <a href=\"thehackernews.com\">thehackernews.com<\/a><\/p>\n<p><span class=\"p-author\">\ue804<span class=\"author\">Ravie Lakshmanan<\/span>\ue802<span class=\"author\">Mar 18, 2026<\/span><\/span><span class=\"p-tags\">Linux \/ Endpoint Security<\/span><\/p>\n<p>A high-severity security flaw affecting default installations of Ubuntu Desktop versions 24.04 and later could be exploited to escalate privileges to the root level.<\/p>\n<p>Tracked as <strong>CVE-2026-3888<\/strong> (CVSS score: 7.8), the issue could allow an attacker to seize control of a susceptible system.<\/p>\n<p>&#8220;This flaw (CVE-2026-3888) allows an unprivileged local attacker to escalate privileges to full root access through the interaction of two standard system components: snap-confine and systemd-tmpfiles,&#8221; the Qualys Threat Research Unit (TRU) said. &#8220;While the exploit requires a specific time-based window (10\u201330 days), the resulting impact is a complete compromise of the host system.&#8221;\u00a0<\/p>\n<p>The problem, Qualys noted, stems from the unintended interaction of snap-confine, which manages execution environments for snap applications by creating a sandbox, and systemd-tmpfiles, which automatically cleans up temporary files and directories (e.g.,\/tmp, \/run, and \/var\/tmp) older than a defined threshold.<\/p>\n<p>The vulnerability has been patched in the following versions &#8211;<\/p>\n<ul>\n<li>Ubuntu 24.04 LTS &#8211; snapd versions prior to 2.73+ubuntu24.04.1<\/li>\n<li>Ubuntu 25.10 LTS &#8211; snapd versions prior to 2.73+ubuntu25.10.1<\/li>\n<li>Ubuntu 26.04 LTS (Dev) &#8211; snapd versions prior to 2.74.1+ubuntu26.04.1<\/li>\n<li>Upstream snapd &#8211; versions prior to 2.75<\/li>\n<\/ul>\n<p>The attack requires low privileges and no user interaction, although the attack complexity is high due to the time-delay mechanism in the exploit chain.<\/p>\n<p>&#8220;In default configurations, systemd-tmpfiles is scheduled to remove stale data in \/tmp,&#8221; Qualys said. &#8220;An attacker can exploit this by manipulating the timing of these cleanup cycles.&#8221;<\/p>\n<p>The attack plays out in the following manner &#8211;<\/p>\n<ul>\n<li>The attacker must wait for the system&#8217;s cleanup daemon to delete a critical directory (\/tmp\/.snap) required by snap-confine. The default period is 30 days in Ubuntu 24.04 and 10 days in later versions.<\/li>\n<li>Once deleted, the attacker recreates the directory with&#8230;<\/li>\n<\/ul>\n<p><a href=\"https:\/\/thehackernews.com\/2026\/03\/ubuntu-cve-2026-3888-bug-lets-attackers.html\">Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ubuntu CVE-2026-3888 Bug Lets Attackers Gain Root via systemd Cleanup Timing Exploit https:\/\/thehackernews.com\/2026\/03\/ubuntu-cve-2026-3888-bug-lets-attackers.html Publish Date:&#8230;<\/p>\n","protected":false},"author":1,"featured_media":224894,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEhjyR0arF1Y7SFoUB29ZhPX6xm5uAf4A7sdyhxPDSK52E3A-m2QCrr2DTMIYLCqIJnOUrQzo81R1_g-EMp82gZjHsMJegHxW4AeKRH3pnfjk2NGlBr5VZ9MoKRdbSgkBNs_039XoCT9eNSfka3VVbIhErq7lsOcW6gmN1CffJjFHrRILmXQgEmyZYz1E4KP\/s1600\/ubuntu.jpg","fifu_image_alt":"","footnotes":""},"categories":[15],"tags":[31,27],"class_list":["post-224893","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","tag-exploit","tag-vulnerability"],"_links":{"self":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/224893"}],"collection":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/comments?post=224893"}],"version-history":[{"count":1,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/224893\/revisions"}],"predecessor-version":[{"id":224895,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/224893\/revisions\/224895"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media\/224894"}],"wp:attachment":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media?parent=224893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/categories?post=224893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/tags?post=224893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}