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UBUNTU-CVE-2021-4159

Dashboard / Vulnerabilities / UBUNTU-CVE-2021-4159

UBUNTU-CVE-2021-4159

Published: 24 Aug 2022Last Modified: 9 Sept 2026

Upstream:

Aliases:

Summary:

Details: A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.

References: https://ubuntu.com/security/CVE-2021-4159, https://ubuntu.com/security/notices/USN-5668-1, https://ubuntu.com/security/notices/USN-5677-1, https://ubuntu.com/security/notices/USN-5682-1, https://ubuntu.com/security/notices/USN-5706-1, https://ubuntu.com/security/notices/USN-5790-1, https://www.cve.org/CVERecord?id=CVE-2021-4159

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 -4.15.0-1158.173~14.04.1

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

4.15.0-1134.147~14.04.1

4.15.0-1136.149~14.04.1

4.15.0-1137.150~14.04.1

4.15.0-1138.151~14.04.1

4.15.0-1139.152~14.04.1

4.15.0-1142.156~14.04.1

4.15.0-1145.160~14.04.1

4.15.0-1146.161~14.04.1

4.15.0-1149.164~14.04.1

4.15.0-1150.165~14.04.1

4.15.0-1151.166~14.04.1

4.15.0-1153.168~14.04.1

4.15.0-1157.172~14.04.2

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