What is CVE-2021-44733?

CVE-2021-44733 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2021-44733 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-44733?

CVE-2021-44733 has a CVSS score of 7.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-44733?

No patch is currently available for CVE-2021-44733. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-44733 actively exploited?

CVE-2021-44733 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2021-44733

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 shared memory object.

Package Linux Kernel

Published 2021-12-22

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.0

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-362

CVE-2021-44733 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-44733 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

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

Exploit Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html

Mailing List Third Party Advisory
Kernel.org
https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/
Security
https://security.netapp.com/advisory/ntap-20220114-0003/

Third Party Advisory
Debian Security
https://www.debian.org/security/2022/dsa-5096

Third Party Advisory
Kernel patch commit
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c
Patch

Details

CVE ID CVE-2021-44733

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2021-12-22

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-44733?

CVE-2021-44733 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2021-44733 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-44733?

CVE-2021-44733 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-44733?

No patch is currently available for CVE-2021-44733. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-44733 actively exploited?

No — CVE-2021-44733 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →