{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"low"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2018-18955","title":"Title"},{"category":"description","text":"In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write() in kernel/user_namespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAP_SYS_ADMIN in an affected user namespace can bypass access controls on resources outside the namespace, as demonstrated by reading /etc/shadow. This occurs because an ID transformation takes place properly for the namespaced-to-kernel direction but not for the kernel-to-namespaced direction.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2018-18955","url":"https://www.suse.com/security/cve/CVE-2018-18955"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1116303 for CVE-2018-18955","url":"https://bugzilla.suse.com/1116303"}],"title":"SUSE CVE CVE-2018-18955","tracking":{"current_release_date":"2025-07-26T23:30:33Z","generator":{"date":"2023-02-15T04:22:23Z","engine":{"name":"cve-database.git:bin/generate-csaf-vex.pl","version":"1"}},"id":"CVE-2018-18955","initial_release_date":"2023-02-15T04:22:23Z","revision_history":[{"date":"2023-02-15T04:22:23Z","number":"2","summary":"Current version"},{"date":"2025-01-01T07:19:32Z","number":"3","summary":"Current version"},{"date":"2025-02-15T08:01:51Z","number":"4","summary":"Current version"},{"date":"2025-02-18T06:55:20Z","number":"5","summary":"Current version"},{"date":"2025-07-26T23:30:33Z","number":"6","summary":"Current version"}],"status":"interim","version":"6"}}}