{"id":"CVE-2019-19039","details":"__btrfs_free_extent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfs_print_leaf in a certain ENOENT case, which allows local users to obtain potentially sensitive information about register values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a vulnerability because “1) The kernel provide facilities to restrict access to dmesg - dmesg_restrict=1 sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be disallowed or not. 2) WARN/WARN_ON are widely used macros in the linux kernel. If this CVE is considered valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is not the case.","modified":"2026-03-12T23:02:56.155300Z","published":"2019-11-21T02:15:23.337Z","references":[{"type":"ADVISORY","url":"https://usn.ubuntu.com/4414-1/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html"},{"type":"EVIDENCE","url":"https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19039"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-19039.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"5.3.12"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"}]}