CVE-2021-44733

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2021-44733
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-12-22 17:15:09 UTC
Updated2026-08-05 18:28:39 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 7 HIGH from [email protected]

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

Problem Types: CWE-362 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary4.4AV:L/AC:M/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:L/AC:M/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Debian -- Security Information -- DSA-5096-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
optee-qemu/README.md at main · pjlantz/optee-qemu · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit, Third Party Advisory
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Vendor Advisory
[SECURITY] [DLA 2941-1] linux-4.19 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
[PATCH v2] tee: handle lookup of shm with reference count 0 - Jens Wiklander af854a3a-2127-422b-91ae-364da2661108 lore.kernel.org Third Party Advisory
January 2022 Linux Kernel Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[PATCH v2] tee: handle lookup of shm with reference count 0 - Jens Wiklander MITRE lore.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159641 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2022-9147)
  • 159642 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel-container (ELSA-2022-9148)
  • 159825 Oracle Enterprise Linux Security Update for kernel (ELSA-2022-1988)
  • 179117 Debian Security Update for linux (DSA 5096-1)
  • 179119 Debian Security Update for linux-4.19 (DLA 2941-1)
  • 179523 Debian Security Update for linux (CVE-2021-44733)
  • 198659 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5278-1)
  • 198707 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5339-1)
  • 198708 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5337-1)
  • 198709 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5338-1)
  • 198731 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5368-1)
  • 198740 Ubuntu Security Notification for Linux kernel (BlueField) Vulnerabilities (USN-5377-1)
  • 240275 Red Hat Update for kernel-rt (RHSA-2022:1975)
  • 240298 Red Hat Update for kernel security (RHSA-2022:1988)
  • 353151 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-009
  • 353160 Amazon Linux Security Advisory for kernel : ALAS2-2022-1749
  • 376925 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2022:0125)
  • 610418 Google Pixel Android June 2022 Security Patch Missing
  • 6140385 AWS Bottlerocket Security Update for kernel (GHSA-vhpv-55cp-2cw3)
  • 671436 EulerOS Security Update for kernel (EulerOS-SA-2022-1352)
  • 671448 EulerOS Security Update for kernel (EulerOS-SA-2022-1450)
  • 671474 EulerOS Security Update for kernel (EulerOS-SA-2022-1429)
  • 671505 EulerOS Security Update for kernel (EulerOS-SA-2022-1489)
  • 671535 EulerOS Security Update for kernel (EulerOS-SA-2022-1508)
  • 751654 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0197-1)
  • 751695 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0367-1)
  • 751696 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0364-1)
  • 751697 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0366-1)
  • 751700 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0363-1)
  • 751701 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0366-1)
  • 751702 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0371-1)
  • 751703 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0372-1)
  • 751704 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0370-1)
  • 752005 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0370-1)
  • 753194 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0288-1)
  • 753212 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0363-1)
  • 753462 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0289-1)
  • 900420 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (7060)
  • 901435 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (7063-1)
  • 905766 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (7060-1)
  • 940517 AlmaLinux Security Update for kernel (ALSA-2022:1988)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report