{"id":"CVE-2021-3995","state":"PUBLISHED","title":"A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local ","description":"A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.","publishedAt":"2022-08-23T00:00:00.000Z","updatedAt":"2024-08-03T17:16:03.736Z","severity":null,"assigner":"redhat","products":["n/a util-linux"],"affected":[{"vendor":"n/a","product":"util-linux","versions":[{"version":"Fixed in util-linux v2.37.3","status":"affected"}]}],"references":["https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes","https://www.openwall.com/lists/oss-security/2022/01/24/2","https://github.com/util-linux/util-linux/commit/57202f5713afa2af20ffbb6ab5331481d0396f8d","https://bugzilla.redhat.com/show_bug.cgi?id=2024631https://access.redhat.com/security/cve/CVE-2021-3995","http://www.openwall.com/lists/oss-security/2022/11/30/2","http://seclists.org/fulldisclosure/2022/Dec/4","http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html","https://security.netapp.com/advisory/ntap-20221209-0002/","https://security.gentoo.org/glsa/202401-08"],"weaknesses":["CWE-552"],"ingestedAt":"2026-10-29T19:48:55.807Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/3xxx/CVE-2021-3995.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-3995","state":"PUBLISHED","datePublished":"2022-08-23T00:00:00.000Z","dateUpdated":"2024-08-03T17:16:03.736Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2021-11-22T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. 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