Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.15.11 |
| Redhat | Enterprise Linux | 8.0 |
| Fedoraproject | Fedora | 35 |
| Debian | Debian Linux | 9.0 |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H300E Firmware | - |
| Netapp | H300E | - |
| Netapp | H500E Firmware | - |
| Netapp | H500E | - |
| Netapp | H700E Firmware | - |
| Netapp | H700E | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
Related Weaknesses (CWE)
References
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd07
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tVendor Advisory
- https://github.com/pjlantz/optee-qemu/blob/main/README.mdExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListThird Party Advisory
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.or
- https://security.netapp.com/advisory/ntap-20220114-0003/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5096Third Party Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd07
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tVendor Advisory
- https://github.com/pjlantz/optee-qemu/blob/main/README.mdExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListThird Party Advisory
- https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.or
- https://security.netapp.com/advisory/ntap-20220114-0003/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5096Third Party Advisory
FAQ
What is CVE-2021-44733?
CVE-2021-44733 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 sh...
How severe is CVE-2021-44733?
CVE-2021-44733 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-44733?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux, Fedoraproject Fedora, Debian Debian Linux, Netapp H410C Firmware.