CVE-2021-44733

Description

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.

References

https://www.debian.org/security/2022/dsa-5096

https://security.netapp.com/advisory/ntap-20220114-0003/

https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/

https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html

https://github.com/pjlantz/optee-qemu/blob/main/README.md

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3