{"id":"CVE-2019-19448","details":"In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.","modified":"2026-04-16T04:41:33.414606827Z","published":"2019-12-08T02:15:09.907Z","references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200103-0001/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4578-1/"},{"type":"EVIDENCE","url":"https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"2.6.31"},{"fixed":"4.4.233"}]},{"events":[{"introduced":"4.5.0"},{"fixed":"4.9.233"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.194"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.141"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.60"}]},{"events":[{"introduced":"5.5.0"},{"fixed":"5.7.17"}]},{"events":[{"introduced":"5.8"},{"fixed":"5.8.3"}]},{"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"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19448.json"}}],"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:H/A:H"}]}