{"id":"CVE-2021-44733","details":"A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.","aliases":["A-213173524","PUB-A-213173524"],"modified":"2026-03-15T22:42:25.075693Z","published":"2021-12-22T17:15:09.123Z","related":["ALSA-2022:1988","MGASA-2022-0021","MGASA-2022-0022","SUSE-SU-2022:0197-1","SUSE-SU-2022:0288-1","SUSE-SU-2022:0289-1","SUSE-SU-2022:0363-1","SUSE-SU-2022:0364-1","SUSE-SU-2022:0366-1","SUSE-SU-2022:0367-1","SUSE-SU-2022:0370-1","SUSE-SU-2022:0371-1","SUSE-SU-2022:0372-1","SUSE-SU-2022:0555-1","openSUSE-SU-2022:0363-1","openSUSE-SU-2022:0366-1","openSUSE-SU-2022:0370-1"],"references":[{"type":"WEB","url":"https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/"},{"type":"WEB","url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d"},{"type":"ADVISORY","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20220114-0003/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5096"},{"type":"EVIDENCE","url":"https://github.com/pjlantz/optee-qemu/blob/main/README.md"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"5.15.11"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"35"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44733.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}