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UBUNTU-CVE-2021-44733

Dashboard / Vulnerabilities / UBUNTU-CVE-2021-44733

UBUNTU-CVE-2021-44733

Published: 22 Dec 2021Last Modified: 9 Sept 2026

Upstream:

Aliases:

Summary:

Details: 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.

References: https://ubuntu.com/security/CVE-2021-44733, https://bugzilla.redhat.com/show_bug.cgi?id=2030747, https://ubuntu.com/security/notices/USN-5278-1, https://ubuntu.com/security/notices/USN-5337-1, https://ubuntu.com/security/notices/USN-5338-1, https://ubuntu.com/security/notices/USN-5339-1, https://ubuntu.com/security/notices/USN-5368-1, https://ubuntu.com/security/notices/USN-5377-1, https://www.cve.org/CVERecord?id=CVE-2021-44733

Affected packages

Package

Name: linux-azure

Purl: pkg:deb/ubuntu/linux-azure?arch=source&distro=trusty%2Fesm

Affected ranges

Type: ECOSYSTEM

Events:

Introduced- 0

Fixed -4.15.0-1134.147~14.04.1

Affected versions

4.15.0-1023.24~14.04.1

4.15.0-1030.31~14.04.1

4.15.0-1031.32~14.04.1

4.15.0-1032.33~14.04.2

4.15.0-1035.36~14.04.2

4.15.0-1036.38~14.04.2

4.15.0-1037.39~14.04.2

4.15.0-1039.41~14.04.2

4.15.0-1040.44~14.04.1

4.15.0-1041.45~14.04.1

4.15.0-1042.46~14.04.1

4.15.0-1045.49~14.04.1

4.15.0-1046.50~14.04.1

4.15.0-1047.51~14.04.1

4.15.0-1049.54~14.04.1

4.15.0-1050.55~14.04.1

4.15.0-1051.56~14.04.1

4.15.0-1052.57~14.04.1

4.15.0-1055.60~14.04.1

4.15.0-1056.61~14.04.1

4.15.0-1057.62~14.04.1

4.15.0-1059.64~14.04.1

4.15.0-1060.65~14.04.1

4.15.0-1061.66~14.04.1

4.15.0-1063.68~14.04.1

4.15.0-1064.69~14.04.1

4.15.0-1066.71~14.04.1

4.15.0-1067.72~14.04.1

4.15.0-1069.74~14.04.1

4.15.0-1071.76~14.04.1

4.15.0-1074.79~14.04.1

4.15.0-1077.82~14.04.1

4.15.0-1082.92~14.04.1

4.15.0-1083.93~14.04.1

4.15.0-1089.99~14.04.1

4.15.0-1091.101~14.04.1

4.15.0-1092.102~14.04.1

4.15.0-1093.103~14.04.1

4.15.0-1095.105~14.04.1

4.15.0-1096.106~14.04.1

4.15.0-1098.109~14.04.1

4.15.0-1100.111~14.04.1

4.15.0-1102.113~14.04.1

4.15.0-1103.114~14.04.1

4.15.0-1106.118~14.04.1

4.15.0-1108.120~14.04.1

4.15.0-1109.121~14.04.1

4.15.0-1110.122~14.04.1

4.15.0-1111.123~14.04.1

4.15.0-1112.124~14.04.1

4.15.0-1113.126~14.04.1

4.15.0-1114.127~14.04.1

4.15.0-1115.128~14.04.1

4.15.0-1118.131~14.04.1

4.15.0-1121.134~14.04.1

4.15.0-1122.135~14.04.1

4.15.0-1123.136~14.04.1

4.15.0-1124.137~14.04.1

4.15.0-1125.138~14.04.1

4.15.0-1126.139~14.04.1

4.15.0-1127.140~14.04.1

4.15.0-1129.142~14.04.1

4.15.0-1130.143~14.04.1

4.15.0-1131.144~14.04.1

4.15.0-1133.146~14.04.1

Common Vulnerability Scoring System

Attack Vector

Network

Adjacent

Local

Physical

Privileges Required

None

Low

High

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality

None

Low

High

Integrity

None

Low

High

Availability

None

Low

High