{"id":"CVE-2026-68116","revision":"7c73e8f17d0847a6a9506b7e866e1200","records":[{"revision":"7c73e8f17d0847a6a9506b7e866e1200","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68116","aliases":[],"title":"vxlan: mdb: Fix source list corruption on a failed replace","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: mdb: Fix source list corruption on a failed replace\n\nWhen replacing the source list of an MDB remote entry, all existing\nsources are first marked for deletion and vxlan_mdb_remote_srcs_add()\nis then called to add the new source list. Sources present in the new\nlist have their deletion mark cleared, and any sources left marked\nafterwards are removed.\n\nIf vxlan_mdb_remote_srcs_add() fails partway through, its error path\ndeletes all entries on the remote's source list. That rollback is only\ncorrect for its other caller, vxlan_mdb_remote_add(), where the remote\nwas just allocated and the list contains solely entries added during\nthe call. On the replace path the list also holds pre-existing sources,\nso a failed replace tears them down together with their (S, G)\nforwarding entries instead of leaving the entry unchanged.\n\nThis is reachable from an existing (*, G) remote. An EXCLUDE filter\nthat loses sources starts forwarding traffic that should be blocked,\nwhile an INCLUDE filter that loses sources drops traffic that should be\nforwarded.\n\nMark entries created during the current pass with a new\nVXLAN_SGRP_F_NEW flag. On failure, delete only those entries and clear\nthe deletion mark on the pre-existing ones, so a failed replace leaves\nthe source list untouched. Retain the flag until the whole operation\nsucceeds and then clear it. Also stop vxlan_mdb_remote_src_add() from\ndeleting a pre-existing entry it only looked up when adding that\nentry's forwarding entry fails.","state":0,"publishedAt":"2026-08-10T11:58:34.612+00:00","modifiedAt":"2026-10-19T20:58:51.286+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/vxlan/vxlan_mdb.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a3a48de5eade770e911d35291217bdd69ce04ef1\",\n                            \"lessThan\": \"5bc8fc1d2ff802eec839e03adef5df597421898d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3a48de5eade770e911d35291217bdd69ce04ef1\",\n                            \"lessThan\": \"2c54dff57606590fa4abec46bab6bea3133f1539\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3a48de5eade770e911d35291217bdd69ce04ef1\",\n                            \"lessThan\": \"79370b573e92e8f190eb5f9a511fa5398340d8b2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3a48de5eade770e911d35291217bdd69ce04ef1\",\n                            \"lessThan\": \"54a3c27b357dfb34f327f89bfadeb998bef8051e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a3a48de5eade770e911d35291217bdd69ce04ef1\",\n                            \"lessThan\": \"dcd9b465965422b9654f6026e8a2fa8984f74c3c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/vxlan/vxlan_mdb.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.148\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H","score":7.9,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/5bc8fc1d2ff802eec839e03adef5df597421898d","https://git.kernel.org/stable/c/2c54dff57606590fa4abec46bab6bea3133f1539","https://git.kernel.org/stable/c/79370b573e92e8f190eb5f9a511fa5398340d8b2","https://git.kernel.org/stable/c/54a3c27b357dfb34f327f89bfadeb998bef8051e","https://git.kernel.org/stable/c/dcd9b465965422b9654f6026e8a2fa8984f74c3c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68116","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68116","identifiers":["CVE-2026-68116"]},"retained":false,"historicalAffected":[]}],"coverage":[]}