CVE-2021-44733
HIGH severity · CVSS 7 · CWE-362
7CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityHigh
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (4)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.cAdvisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlAdvisory
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/
- https://security.netapp.com/advisory/ntap-20220114-0003/Advisory
- https://www.debian.org/security/2022/dsa-5096Advisory
- https://github.com/pjlantz/optee-qemu/blob/main/README.mdAdvisory