{"id":"UBUNTU-CVE-2019-18198","details":"In the Linux kernel before 5.3.4, a reference count usage error in the fib6_rule_suppress() function in the fib6 suppression feature of net/ipv6/fib6_rules.c, when handling the FIB_LOOKUP_NOREF flag, can be exploited by a local attacker to corrupt memory, aka CID-ca7a03c41753.","modified":"2026-02-04T04:25:18.043460Z","published":"2019-10-17T00:00:00Z","related":["USN-4161-1"],"upstream":["CVE-2019-18198"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-18198"},{"type":"REPORT","url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca7a03c4175366a92cee0ccc4fec0038c3266e26"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4161-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-18198"}],"affected":[{"package":{"name":"linux-azure-fde","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-azure-fde@5.4.0-1103.109+cvm1.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.0-1063.66+cvm2.2","5.4.0-1063.66+cvm3.2","5.4.0-1064.67+cvm1.1","5.4.0-1065.68+cvm2.1","5.4.0-1067.70+cvm1.1","5.4.0-1068.71+cvm1.1","5.4.0-1069.72+cvm1.1","5.4.0-1070.73+cvm1.1","5.4.0-1072.75+cvm1.1","5.4.0-1073.76+cvm1.1","5.4.0-1074.77+cvm1.1","5.4.0-1076.79+cvm1.1","5.4.0-1078.81+cvm1.1","5.4.0-1080.83+cvm1.1","5.4.0-1083.87+cvm1.1","5.4.0-1085.90+cvm1.1","5.4.0-1085.90+cvm2.1","5.4.0-1086.91+cvm1.1","5.4.0-1089.94+cvm1.2","5.4.0-1090.95+cvm1.1","5.4.0-1091.96+cvm1.1","5.4.0-1092.97+cvm1.1","5.4.0-1095.101+cvm1.1","5.4.0-1098.104+cvm1.1","5.4.0-1100.106+cvm1.1","5.4.0-1103.109+cvm1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-image-unsigned-5.4.0-1103-azure-fde","binary_version":"5.4.0-1103.109+cvm1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-18198.json"}},{"package":{"name":"linux-gke","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-gke@5.4.0-1105.112?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.0-1033.35","5.4.0-1035.37","5.4.0-1036.38","5.4.0-1037.39","5.4.0-1039.41","5.4.0-1041.43","5.4.0-1042.44","5.4.0-1043.45","5.4.0-1044.46","5.4.0-1046.48","5.4.0-1049.52","5.4.0-1051.54","5.4.0-1052.55","5.4.0-1053.56","5.4.0-1054.57","5.4.0-1055.58","5.4.0-1056.59","5.4.0-1057.60","5.4.0-1059.62","5.4.0-1061.64","5.4.0-1062.65","5.4.0-1063.66","5.4.0-1065.68","5.4.0-1066.69","5.4.0-1067.70","5.4.0-1068.71","5.4.0-1071.76","5.4.0-1072.77","5.4.0-1074.79","5.4.0-1076.82","5.4.0-1078.84","5.4.0-1080.86","5.4.0-1081.87","5.4.0-1083.89","5.4.0-1084.90","5.4.0-1086.93","5.4.0-1087.94","5.4.0-1090.97","5.4.0-1091.98","5.4.0-1094.101","5.4.0-1095.102","5.4.0-1096.103","5.4.0-1097.104","5.4.0-1098.105","5.4.0-1099.106","5.4.0-1100.107","5.4.0-1101.108","5.4.0-1102.109","5.4.0-1103.110","5.4.0-1104.111","5.4.0-1105.112"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-buildinfo-5.4.0-1105-gke","binary_version":"5.4.0-1105.112"},{"binary_name":"linux-gke-headers-5.4.0-1105","binary_version":"5.4.0-1105.112"},{"binary_name":"linux-gke-tools-5.4.0-1105","binary_version":"5.4.0-1105.112"},{"binary_name":"linux-headers-5.4.0-1105-gke","binary_version":"5.4.0-1105.112"},{"binary_name":"linux-image-unsigned-5.4.0-1105-gke","binary_version":"5.4.0-1105.112"},{"binary_name":"linux-modules-5.4.0-1105-gke","binary_version":"5.4.0-1105.112"},{"binary_name":"linux-modules-extra-5.4.0-1105-gke","binary_version":"5.4.0-1105.112"},{"binary_version":"5.4.0-1105.112","binary_name":"linux-tools-5.4.0-1105-gke"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-18198.json"}},{"package":{"name":"linux-gkeop","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-gkeop@5.4.0-1102.106?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.0-1008.9","5.4.0-1009.10","5.4.0-1010.11","5.4.0-1011.12","5.4.0-1012.13","5.4.0-1013.14","5.4.0-1014.15","5.4.0-1015.16","5.4.0-1016.17","5.4.0-1018.19","5.4.0-1021.22","5.4.0-1022.23","5.4.0-1023.24","5.4.0-1024.25","5.4.0-1025.26","5.4.0-1026.27","5.4.0-1027.28","5.4.0-1029.30","5.4.0-1031.32","5.4.0-1032.33","5.4.0-1033.34","5.4.0-1034.35","5.4.0-1036.37","5.4.0-1037.38","5.4.0-1038.39","5.4.0-1039.40","5.4.0-1040.41","5.4.0-1043.44","5.4.0-1046.48","5.4.0-1048.51","5.4.0-1049.52","5.4.0-1051.54","5.4.0-1052.55","5.4.0-1053.56","5.4.0-1054.57","5.4.0-1056.60","5.4.0-1057.61","5.4.0-1060.64","5.4.0-1061.65","5.4.0-1062.66","5.4.0-1064.68","5.4.0-1065.69","5.4.0-1066.70","5.4.0-1067.71","5.4.0-1068.72","5.4.0-1069.73","5.4.0-1070.74","5.4.0-1071.75","5.4.0-1072.76","5.4.0-1073.77","5.4.0-1074.78","5.4.0-1075.79","5.4.0-1076.80","5.4.0-1077.81","5.4.0-1078.82","5.4.0-1079.83","5.4.0-1080.84","5.4.0-1081.85","5.4.0-1083.87","5.4.0-1084.88","5.4.0-1085.89","5.4.0-1086.90","5.4.0-1087.91","5.4.0-1088.92","5.4.0-1089.93","5.4.0-1090.94","5.4.0-1091.95","5.4.0-1092.96","5.4.0-1093.97","5.4.0-1094.98","5.4.0-1095.99","5.4.0-1096.100","5.4.0-1097.101","5.4.0-1098.102","5.4.0-1099.103","5.4.0-1100.104","5.4.0-1101.105","5.4.0-1102.106"],"ecosystem_spe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