CVE-2021-20177
CVE-2021-20177
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.
CVSS 4.4 · Medium · EPSS 0.3% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
kernel
- Versions
- kernel 5.5-rc1: Affected
No fix published
linux Debian:12
- Affected ranges
- ECOSYSTEM: < 5.5.13-1
Update to 5.5.13-1
linux Debian:13
- Affected ranges
- ECOSYSTEM: < 5.5.13-1
Update to 5.5.13-1
linux Debian:14
- Affected ranges
- ECOSYSTEM: < 5.5.13-1
Update to 5.5.13-1
linux-hwe-edge Ubuntu:16.04:LTS
- Versions
- 4.8.0-28.30~16.04.1
- 4.8.0-30.32~16.04.1
- 4.8.0-32.34~16.04.1
- 4.8.0-34.36~16.04.1
- 4.10.0-14.16~16.04.1
- 4.10.0-19.21~16.04.1
- 4.10.0-20.22~16.04.1
- 4.10.0-21.23~16.04.1
- 4.10.0-22.24~16.04.1
- 4.10.0-24.28~16.04.1
- 4.10.0-26.30~16.04.1
- 4.11.0-13.19~16.04.1
- 4.11.0-14.20~16.04.1
- 4.13.0-16.19~16.04.3
- 4.13.0-17.20~16.04.1
- 4.13.0-19.22~16.04.1
- 4.13.0-21.24~16.04.1
- 4.13.0-25.29~16.04.2
- 4.15.0-13.14~16.04.1
- 4.15.0-15.16~16.04.1
- 4.15.0-20.21~16.04.1
- 4.15.0-22.24~16.04.1
- 4.15.0-23.25~16.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-aws-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-1018.18~18.04.1
- 5.4.0-1020.20~18.04.2
- 5.4.0-1022.22~18.04.1
- 5.4.0-1024.24~18.04.1
- 5.4.0-1025.25~18.04.1
- 5.4.0-1028.29~18.04.1
- 5.4.0-1029.30~18.04.1
- 5.4.0-1030.31~18.04.1
- 5.4.0-1032.33~18.04.1
- 5.4.0-1034.35~18.04.1
- 5.4.0-1035.37~18.04.1
- 5.4.0-1037.39~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-1038.40~18.04.1
Update to 5.4.0-1038.40~18.04.1
linux-azure-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-1020.20~18.04.1
- 5.4.0-1022.22~18.04.1
- 5.4.0-1023.23~18.04.1
- 5.4.0-1025.25~18.04.1
- 5.4.0-1026.26~18.04.1
- 5.4.0-1031.32~18.04.1
- 5.4.0-1032.33~18.04.1
- 5.4.0-1034.35~18.04.1
- 5.4.0-1035.36~18.04.1
- 5.4.0-1036.38~18.04.1
- 5.4.0-1039.41~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-1040.42~18.04.1
Update to 5.4.0-1040.42~18.04.1
linux-gcp-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-1019.19~18.04.2
- 5.4.0-1021.21~18.04.1
- 5.4.0-1022.22~18.04.1
- 5.4.0-1024.24~18.04.1
- 5.4.0-1025.25~18.04.1
- 5.4.0-1028.29~18.04.1
- 5.4.0-1029.31~18.04.1
- 5.4.0-1030.32~18.04.1
- 5.4.0-1032.34~18.04.1
- 5.4.0-1033.35~18.04.1
- 5.4.0-1034.37~18.04.1
- 5.4.0-1036.39~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-1037.40~18.04.1
Update to 5.4.0-1037.40~18.04.1
linux-gke-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-1025.25~18.04.1
- 5.4.0-1027.28~18.04.1
- 5.4.0-1029.31~18.04.1
- 5.4.0-1030.32~18.04.1
- 5.4.0-1032.34~18.04.1
- 5.4.0-1033.35~18.04.1
- 5.4.0-1035.37~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-1036.38~18.04.1
Update to 5.4.0-1036.38~18.04.1
linux-gkeop-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-1001.1
- 5.4.0-1003.3
- 5.4.0-1004.5
- 5.4.0-1005.6
- 5.4.0-1007.8~18.04.1
- 5.4.0-1008.9~18.04.1
- 5.4.0-1009.10~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-1010.11~18.04.1
Update to 5.4.0-1010.11~18.04.1
linux-hwe-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-37.41~18.04.1
- 5.4.0-39.43~18.04.1
- 5.4.0-40.44~18.04.1
- 5.4.0-42.46~18.04.1
- 5.4.0-45.49~18.04.2
- 5.4.0-47.51~18.04.1
- 5.4.0-48.52~18.04.1
- 5.4.0-51.56~18.04.1
- 5.4.0-52.57~18.04.1
- 5.4.0-53.59~18.04.1
- 5.4.0-54.60~18.04.1
- 5.4.0-56.62~18.04.1
- 5.4.0-58.64~18.04.1
- 5.4.0-59.65~18.04.1
- 5.4.0-60.67~18.04.1
- 5.4.0-62.70~18.04.1
- 5.4.0-64.72~18.04.1
- 5.4.0-65.73~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-66.74~18.04.2
Update to 5.4.0-66.74~18.04.2
linux-oracle-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-1019.19~18.04.1
- 5.4.0-1021.21~18.04.1
- 5.4.0-1022.22~18.04.1
- 5.4.0-1024.24~18.04.1
- 5.4.0-1025.25~18.04.1
- 5.4.0-1028.29~18.04.1
- 5.4.0-1029.31~18.04.1
- 5.4.0-1030.32~18.04.1
- 5.4.0-1033.35
- 5.4.0-1034.36~18.04.1
- 5.4.0-1035.38~18.04.1
- 5.4.0-1037.40~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-1038.41~18.04.1
Update to 5.4.0-1038.41~18.04.1
linux-raspi-5.4 Ubuntu:18.04:LTS
- Versions
- 5.4.0-1013.13~18.04.1
- 5.4.0-1015.15~18.04.1
- 5.4.0-1016.17~18.04.1
- 5.4.0-1018.20~18.04.1
- 5.4.0-1019.21~18.04.1
- 5.4.0-1021.24~18.04.1
- 5.4.0-1022.25~18.04.1
- 5.4.0-1023.26~18.04.1
- 5.4.0-1025.28~18.04.1
- 5.4.0-1026.29~18.04.1
- 5.4.0-1028.31~18.04.1
- Affected ranges
- ECOSYSTEM: < 5.4.0-1029.32~18.04.1
Update to 5.4.0-1029.32~18.04.1
linux-aws-5.0 Ubuntu:18.04:LTS
- Versions
- 5.0.0-1021.24~18.04.1
- 5.0.0-1022.25~18.04.1
- 5.0.0-1023.26~18.04.1
- 5.0.0-1024.27~18.04.1
- 5.0.0-1025.28
- 5.0.0-1027.30
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-aws-5.3 Ubuntu:18.04:LTS
- Versions
- 5.3.0-1016.17~18.04.1
- 5.3.0-1017.18~18.04.1
- 5.3.0-1019.21~18.04.1
- 5.3.0-1023.25~18.04.1
- 5.3.0-1028.30~18.04.1
- 5.3.0-1030.32~18.04.1
- 5.3.0-1032.34~18.04.2
- 5.3.0-1033.35
- 5.3.0-1034.36
- 5.3.0-1035.37
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-azure Ubuntu:18.04:LTS
- Versions
- 4.15.0-1002.2
- 4.15.0-1003.3
- 4.15.0-1004.4
- 4.15.0-1008.8
- 4.15.0-1009.9
- 4.15.0-1012.12
- 4.15.0-1013.13
- 4.15.0-1014.14
- 4.15.0-1018.18
- 4.15.0-1019.19
- 4.15.0-1021.21
- 4.15.0-1022.23
- 4.15.0-1023.24
- 4.15.0-1025.26
- 4.15.0-1028.29
- 4.15.0-1030.31
- 4.15.0-1031.32
- 4.15.0-1032.33
- 4.15.0-1035.36
- 4.15.0-1036.38
- 4.15.0-1037.39
- 4.18.0-1011.11~18.04.1
- 4.18.0-1013.13~18.04.1
- 4.18.0-1014.14~18.04.1
- 4.18.0-1018.18~18.04.1
- 4.18.0-1019.19~18.04.1
- 4.18.0-1020.20~18.04.1
- 4.18.0-1023.24~18.04.1
- 4.18.0-1024.25~18.04.1
- 4.18.0-1025.27~18.04.1
- 5.0.0-1014.14~18.04.1
- 5.0.0-1016.17~18.04.1
- 5.0.0-1018.19~18.04.1
- 5.0.0-1020.21~18.04.1
- 5.0.0-1022.23~18.04.1
- 5.0.0-1023.24~18.04.1
- 5.0.0-1025.27~18.04.1
- 5.0.0-1027.29~18.04.1
- 5.0.0-1028.30~18.04.1
- 5.0.0-1029.31~18.04.1
- 5.0.0-1031.33
- 5.0.0-1032.34
- 5.0.0-1035.37
- 5.0.0-1036.38
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-azure-5.3 Ubuntu:18.04:LTS
- Versions
- 5.3.0-1007.8~18.04.1
- 5.3.0-1008.9~18.04.1
- 5.3.0-1009.10~18.04.1
- 5.3.0-1010.11~18.04.1
- 5.3.0-1012.13~18.04.1
- 5.3.0-1013.14~18.04.1
- 5.3.0-1016.17~18.04.1
- 5.3.0-1018.19~18.04.1
- 5.3.0-1019.20~18.04.1
- 5.3.0-1020.21~18.04.1
- 5.3.0-1022.23~18.04.1
- 5.3.0-1028.29~18.04.1
- 5.3.0-1031.32~18.04.1
- 5.3.0-1032.33~18.04.1
- 5.3.0-1034.35~18.04.1
- 5.3.0-1035.36
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-azure-edge Ubuntu:18.04:LTS
- Versions
- 4.18.0-1006.6~18.04.1
- 4.18.0-1007.7~18.04.1
- 4.18.0-1008.8~18.04.1
- 5.0.0-1012.12~18.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-gcp Ubuntu:18.04:LTS
- Versions
- 4.15.0-1001.1
- 4.15.0-1003.3
- 4.15.0-1005.5
- 4.15.0-1006.6
- 4.15.0-1008.8
- 4.15.0-1009.9
- 4.15.0-1010.10
- 4.15.0-1014.14
- 4.15.0-1015.15
- 4.15.0-1017.18
- 4.15.0-1018.19
- 4.15.0-1019.20
- 4.15.0-1021.22
- 4.15.0-1023.24
- 4.15.0-1024.25
- 4.15.0-1025.26
- 4.15.0-1026.27
- 4.15.0-1027.28
- 4.15.0-1028.29
- 4.15.0-1029.31
- 4.15.0-1030.32
- 4.15.0-1032.34
- 4.15.0-1033.35
- 4.15.0-1034.36
- 4.15.0-1036.38
- 4.15.0-1037.39
- 4.15.0-1040.42
- 4.15.0-1042.45
- 4.15.0-1044.70
- 5.0.0-1020.20~18.04.1
- 5.0.0-1021.21~18.04.1
- 5.0.0-1025.26~18.04.1
- 5.0.0-1026.27~18.04.1
- 5.0.0-1028.29~18.04.1
- 5.0.0-1029.30~18.04.1
- 5.0.0-1031.32
- 5.0.0-1033.34
- 5.0.0-1034.35
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-gcp-5.3 Ubuntu:18.04:LTS
- Versions
- 5.3.0-1008.9~18.04.1
- 5.3.0-1009.10~18.04.1
- 5.3.0-1010.11~18.04.1
- 5.3.0-1012.13~18.04.1
- 5.3.0-1014.15~18.04.1
- 5.3.0-1016.17~18.04.1
- 5.3.0-1017.18~18.04.1
- 5.3.0-1018.19~18.04.1
- 5.3.0-1020.22~18.04.1
- 5.3.0-1026.28~18.04.1
- 5.3.0-1029.31~18.04.1
- 5.3.0-1030.32~18.04.1
- 5.3.0-1032.34~18.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-gcp-edge Ubuntu:18.04:LTS
- Versions
- 4.18.0-1004.5~18.04.1
- 4.18.0-1005.6~18.04.1
- 4.18.0-1006.7~18.04.1
- 4.18.0-1007.8~18.04.1
- 4.18.0-1008.9~18.04.1
- 4.18.0-1009.10~18.04.1
- 4.18.0-1011.12~18.04.1
- 4.18.0-1012.13~18.04.1
- 4.18.0-1013.14~18.04.1
- 4.18.0-1015.16~18.04.1
- 5.0.0-1011.11~18.04.1
- 5.0.0-1013.13~18.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-hwe Ubuntu:18.04:LTS
- Versions
- 4.18.0-13.14~18.04.1
- 4.18.0-14.15~18.04.1
- 4.18.0-15.16~18.04.1
- 4.18.0-16.17~18.04.1
- 4.18.0-17.18~18.04.1
- 4.18.0-18.19~18.04.1
- 4.18.0-20.21~18.04.1
- 4.18.0-21.22~18.04.1
- 4.18.0-22.23~18.04.1
- 4.18.0-24.25~18.04.1
- 4.18.0-25.26~18.04.1
- 5.0.0-23.24~18.04.1
- 5.0.0-25.26~18.04.1
- 5.0.0-27.28~18.04.1
- 5.0.0-29.31~18.04.1
- 5.0.0-31.33~18.04.1
- 5.0.0-32.34~18.04.2
- 5.0.0-35.38~18.04.1
- 5.0.0-36.39~18.04.1
- 5.0.0-37.40~18.04.1
- 5.3.0-26.28~18.04.1
- 5.3.0-28.30~18.04.1
- 5.3.0-40.32~18.04.1
- 5.3.0-42.34~18.04.1
- 5.3.0-45.37~18.04.1
- 5.3.0-46.38~18.04.1
- 5.3.0-51.44~18.04.2
- 5.3.0-53.47~18.04.1
- 5.3.0-59.53~18.04.1
- 5.3.0-61.55~18.04.1
- 5.3.0-62.56~18.04.1
- 5.3.0-64.58~18.04.1
- 5.3.0-65.59
- 5.3.0-66.60
- 5.3.0-67.61
- 5.3.0-68.63
- 5.3.0-69.65
- 5.3.0-70.66
- 5.3.0-72.68
- 5.3.0-73.69
- 5.3.0-74.70
- 5.3.0-75.71
- 5.3.0-76.72
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-hwe-edge Ubuntu:18.04:LTS
- Versions
- 5.0.0-15.16~18.04.1
- 5.0.0-16.17~18.04.1
- 5.0.0-17.18~18.04.1
- 5.0.0-19.20~18.04.1
- 5.0.0-20.21~18.04.1
- 5.3.0-19.20~18.04.2
- 5.3.0-22.24~18.04.1
- 5.3.0-23.25~18.04.1
- 5.3.0-23.25~18.04.2
- 5.3.0-24.26~18.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
linux-oem Ubuntu:18.04:LTS
- Versions
- 4.15.0-1002.3
- 4.15.0-1004.5
- 4.15.0-1006.9
- 4.15.0-1008.11
- 4.15.0-1009.12
- 4.15.0-1012.15
- 4.15.0-1013.16
- 4.15.0-1015.18
- 4.15.0-1017.20
- 4.15.0-1018.21
- 4.15.0-1021.24
- 4.15.0-1024.29
- 4.15.0-1026.31
- 4.15.0-1028.33
- 4.15.0-1030.35
- 4.15.0-1033.38
- 4.15.0-1034.39
- 4.15.0-1035.40
- 4.15.0-1036.41
- 4.15.0-1038.43
- 4.15.0-1039.44
- 4.15.0-1043.48
- 4.15.0-1045.50
- 4.15.0-1050.57
- 4.15.0-1056.65
- 4.15.0-1057.66
- 4.15.0-1059.68
- 4.15.0-1063.72
- 4.15.0-1064.73
- 4.15.0-1065.75
- 4.15.0-1066.76
- 4.15.0-1067.77
- 4.15.0-1069.79
- 4.15.0-1073.83
- 4.15.0-1076.86
- 4.15.0-1079.89
- 4.15.0-1080.90
- 4.15.0-1081.91
- 4.15.0-1087.97
- 4.15.0-1090.100
- 4.15.0-1091.101
- 4.15.0-1093.103
- 4.15.0-1094.104
- 4.15.0-1096.106
- 4.15.0-1097.107
- 4.15.0-1099.109
- 4.15.0-1100.110
- 4.15.0-1101.112
- 4.15.0-1102.113
- 4.15.0-1103.114
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published