CVE-2021-44733
HIGH 7.0EPSS 0.7%
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.
- CVSS v3.1 NVD
- 7.0 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 4.4 MEDIUM
AV:L/AC:M/Au:N/C:P/I:P/A:P - EPSS
- 0.75% chance of exploitation in the next 30 days, 54th percentile
- Published
- 2021-12-22
- Updated
- 2024-08-04
Proof-of-concept exploits (1)
- pjlantz/optee-qemu76★ · 2021-12-28
Security advisories
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_sh…
- pjlantz/optee-qemu/blob/main/README.md
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org
- https://security.netapp.com/advisory/ntap-20220114-0003
- https://www.debian.org/security/2022/dsa-5096
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea7…