⌘ + K

UBUNTU-CVE-2021-47060

Dashboard / Vulnerabilities / UBUNTU-CVE-2021-47060

UBUNTU-CVE-2021-47060

Published: 29 Feb 2024Last Modified: 5 Oct 2026

Upstream:

CVE-2021-47060

Summary:

Details: In the Linux kernel, the following vulnerability has been resolved: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices _except_ the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continue iterating on coalesced_zones after future entries (in the walk) have been deleted. Opportunistically add curly braces to the for-loop, which encompasses many lines but sneaks by without braces due to the guts being a single if statement.

References: https://ubuntu.com/security/CVE-2021-47060, https://git.kernel.org/linus/5d3c4c79384af06e3c8e25b7770b6247496b4417, https://www.cve.org/CVERecord?id=CVE-2021-47060

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

4.4.0-1159.165

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