7.0
HIGH
CVE-2021-44733
Linux TEE Subsystem Use-After-Free 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.

INFO

Published Date :

Dec. 22, 2021, 5:15 p.m.

Last Modified :

Nov. 21, 2024, 6:31 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.0
Public PoC/Exploit Available at Github

CVE-2021-44733 has a 8 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-44733 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Netapp h410c_firmware
2 Netapp h300s_firmware
3 Netapp h500s_firmware
4 Netapp h700s_firmware
5 Netapp h410s_firmware
6 Netapp h300s
7 Netapp h410s
8 Netapp h500s
9 Netapp h700s
10 Netapp h410c
11 Netapp h300e_firmware
12 Netapp h500e_firmware
13 Netapp h700e_firmware
14 Netapp h300e
15 Netapp h500e
16 Netapp h700e
1 Linux linux_kernel
1 Redhat enterprise_linux
1 Fedoraproject fedora
1 Debian debian_linux
: Total Affected Vendor : 5 | Products : 20
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-44733.

URL Resource
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c Vendor Advisory
https://github.com/pjlantz/optee-qemu/blob/main/README.md Exploit Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List Third Party Advisory
https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/
https://security.netapp.com/advisory/ntap-20220114-0003/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c Vendor Advisory
https://github.com/pjlantz/optee-qemu/blob/main/README.md Exploit Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List Third Party Advisory
https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/
https://security.netapp.com/advisory/ntap-20220114-0003/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
NaInSec/CVE-PoC-in-GitHub

All CVE - PoC in GitHub

poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate

Updated: 1 month, 2 weeks ago
8 stars 3 fork 3 watcher
Born at : March 22, 2024, 3:58 p.m. This repo has been linked 928 different CVEs too.
Profile Photo
zecool/cve

None

Updated: 9 months, 1 week ago
1 stars 0 fork 0 watcher
Born at : March 11, 2024, 1:21 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
knd06/linux-kernel-exploitation

None

Updated: 3 weeks, 4 days ago
7 stars 0 fork 0 watcher
Born at : Feb. 25, 2023, 10:40 a.m. This repo has been linked 178 different CVEs too.
Profile Photo
WhooAmii/POC_to_review

None

Updated: 10 months ago
2 stars 2 fork 2 watcher
Born at : Nov. 25, 2022, 5:43 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
soosmile/POC

None

Updated: 5 months, 3 weeks ago
8 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 943 different CVEs too.
Profile Photo
pjlantz/optee-qemu

Environment with vulnerable kernel for exploitation of the TEE driver (CVE-2021-44733)

Updated: 8 months ago
74 stars 12 fork 12 watcher
Born at : Dec. 23, 2021, 5:45 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
joydo/CVE-Writeups

My Personal Reading lists for CVE Writeups

Python

Updated: 1 month, 3 weeks ago
32 stars 5 fork 5 watcher
Born at : April 15, 2021, 1:15 a.m. This repo has been linked 31 different CVEs too.
Profile Photo
xairy/linux-kernel-exploitation

A collection of links related to Linux kernel security and exploitation

linux-kernel kernel-exploitation exploit privilege-escalation security

Updated: 2 weeks, 2 days ago
5658 stars 912 fork 912 watcher
Born at : Nov. 13, 2016, 10:21 p.m. This repo has been linked 239 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-44733 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-44733 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c
    Added Reference https://github.com/pjlantz/optee-qemu/blob/main/README.md
    Added Reference https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
    Added Reference https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/
    Added Reference https://security.netapp.com/advisory/ntap-20220114-0003/
    Added Reference https://www.debian.org/security/2022/dsa-5096
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Mar. 25, 2024

    Action Type Old Value New Value
    Added Reference MITRE https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd0743f1d9ea76931510ed150334d571fbab49d [No types assigned]
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h500s:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h700s:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h300e:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h500e:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h700e:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h410s:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h300s:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Nov. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:netapp:baseboard_management_controller_h410c:-:*:*:*:*:*:*:* OR *cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lore.kernel.org/lkml/20211215092501.1861229-1-jens.wiklander%40linaro.org/ [No types assigned]
    Removed Reference MITRE https://lore.kernel.org/lkml/[email protected]/
  • CWE Remap by [email protected]

    Aug. 08, 2023

    Action Type Old Value New Value
    Changed CWE CWE-416 CWE-362
  • Reanalysis by [email protected]

    Jun. 01, 2022

    Action Type Old Value New Value
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h300s:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h410c_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h410c:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h500s:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h300s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h300s:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h700s:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h500s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h500s:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h300e:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h700s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h700s:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h500e:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h300e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h300e:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h700e:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h500e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h500e:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h410s:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h700e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h700e:-:*:*:*:*:*:*:*
    Changed CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h410c:*:*:*:*:*:*:* AND OR *cpe:2.3:o:netapp:baseboard_management_controller_h410s_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller_h410s:-:*:*:*:*:*:*:*
  • Modified Analysis by [email protected]

    Apr. 01, 2022

    Action Type Old Value New Value
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20220114-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20220114-0003/ Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2022/dsa-5096 No Types Assigned https://www.debian.org/security/2022/dsa-5096 Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h300s:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h500s:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h700s:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h300e:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h500e:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h700e:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h410s:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netapp:baseboard_management_controller_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:baseboard_management_controller:h410c:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Mar. 10, 2022

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2022/dsa-5096 [No Types Assigned]
    Added Reference https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 14, 2022

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20220114-0003/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jan. 03, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/tee/tee_shm.c Vendor Advisory
    Changed Reference Type https://github.com/pjlantz/optee-qemu/blob/main/README.md No Types Assigned https://github.com/pjlantz/optee-qemu/blob/main/README.md Exploit, Third Party Advisory
    Changed Reference Type https://lore.kernel.org/lkml/[email protected]/ No Types Assigned https://lore.kernel.org/lkml/[email protected]/ Mailing List, Vendor Advisory
    Added CWE NIST CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (including) 5.15.11
    Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Dec. 27, 2021

    Action Type Old Value New Value
    Added Reference https://github.com/pjlantz/optee-qemu/blob/main/README.md [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-44733 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-44733 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} -0.03%

score

0.39239

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: