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UBUNTU-CVE-2021-33624

Dashboard / Vulnerabilities / UBUNTU-CVE-2021-33624

UBUNTU-CVE-2021-33624

Published: 23 Jun 2021Last Modified: 9 Sept 2026

Upstream:

Aliases:

Summary:

Details: In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

References: https://ubuntu.com/security/CVE-2021-33624, https://www.openwall.com/lists/oss-security/2021/06/21/1, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=d203b0fd863a2261e5d00b97f3d060c4c2a6db71, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=fe9a5ca7e370e613a9a75a13008a3845ea759d6e, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=9183671af6dbf60a1219371d4ed73e23f43b49db, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=973377ffe8148180b2651825b92ae91988141b05, https://ubuntu.com/security/notices/USN-5091-1, https://ubuntu.com/security/notices/USN-5092-1, https://ubuntu.com/security/notices/USN-5092-2, https://ubuntu.com/security/notices/USN-5091-2, https://ubuntu.com/security/notices/USN-5115-1, https://www.cve.org/CVERecord?id=CVE-2021-33624

Affected packages

Package

Name: linux-aws

Purl: pkg:deb/ubuntu/linux-aws?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type: ECOSYSTEM

Events:

Introduced- 0

Fixed -None

Affected versions

4.4.0-1002.2

4.4.0-1003.3

4.4.0-1005.5

4.4.0-1006.6

4.4.0-1009.9

4.4.0-1010.10

4.4.0-1011.11

4.4.0-1012.12

4.4.0-1014.14

4.4.0-1016.16

4.4.0-1017.17

4.4.0-1019.19

4.4.0-1022.22

4.4.0-1023.23

4.4.0-1024.25

4.4.0-1025.26

4.4.0-1027.30

4.4.0-1028.31

4.4.0-1029.32

4.4.0-1031.34

4.4.0-1032.35

4.4.0-1034.37

4.4.0-1036.39

4.4.0-1037.40

4.4.0-1038.41

4.4.0-1039.42

4.4.0-1040.43

4.4.0-1042.45

4.4.0-1044.47

4.4.0-1045.48

4.4.0-1046.50

4.4.0-1048.52

4.4.0-1050.54

4.4.0-1052.56

4.4.0-1054.58

4.4.0-1055.59

4.4.0-1056.60

4.4.0-1058.62

4.4.0-1059.63

4.4.0-1060.64

4.4.0-1061.65

4.4.0-1062.66

4.4.0-1064.68

4.4.0-1065.69

4.4.0-1066.70

4.4.0-1067.71

4.4.0-1073.77

4.4.0-1074.78

4.4.0-1075.79

4.4.0-1076.80

4.4.0-1077.81

4.4.0-1078.82

4.4.0-1081.85

4.4.0-1082.86

4.4.0-1083.87

4.4.0-1085.89

4.4.0-1086.90

4.4.0-1087.91

4.4.0-1088.92

4.4.0-1090.94

4.4.0-1091.95

4.4.0-1092.96

4.4.0-1093.97

4.4.0-1094.99

4.4.0-1095.100

4.4.0-1096.101

4.4.0-1097.102

4.4.0-1098.103

4.4.0-1099.104

4.4.0-1101.106

4.4.0-1102.107

4.4.0-1103.108

4.4.0-1104.109

4.4.0-1107.113

4.4.0-1109.115

4.4.0-1110.116

4.4.0-1111.117

4.4.0-1112.118

4.4.0-1113.119

4.4.0-1114.120

4.4.0-1115.121

4.4.0-1116.122

4.4.0-1117.123

4.4.0-1118.124

4.4.0-1119.125

4.4.0-1120.126

4.4.0-1121.127

4.4.0-1122.128

4.4.0-1123.129

4.4.0-1124.130

4.4.0-1125.131

4.4.0-1127.133

4.4.0-1128.134

4.4.0-1129.135

4.4.0-1130.136

4.4.0-1131.137

4.4.0-1133.139

4.4.0-1134.140

4.4.0-1135.141

4.4.0-1136.142

4.4.0-1137.143

4.4.0-1138.144

4.4.0-1139.145

4.4.0-1140.146

4.4.0-1141.147

4.4.0-1142.148

4.4.0-1143.149

4.4.0-1144.150

4.4.0-1145.151

4.4.0-1146.152

4.4.0-1147.153

4.4.0-1148.154

4.4.0-1149.155

4.4.0-1150.156

4.4.0-1151.157

4.4.0-1152.158

4.4.0-1153.159

4.4.0-1154.160

4.4.0-1155.161

4.4.0-1156.162

4.4.0-1157.163

4.4.0-1158.164

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