{"id":"CVE-2026-74475","revision":"187fdc3251174db7aa261d843ab1558d","records":[{"revision":"187fdc3251174db7aa261d843ab1558d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74475","aliases":[],"title":"vxlan: use neigh_ha_snapshot() in route_shortcircuit()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: use neigh_ha_snapshot() in route_shortcircuit()\n\nThe neighbour hardware address n->ha can be updated asynchronously by the\nneighbour subsystem, protected by n->ha_lock seqlock. Reading n->ha without\nholding the seqlock loop can lead to torn reads or reading a partially updated\nMAC address.\n\nUse neigh_ha_snapshot() in route_shortcircuit() to safely copy n->ha under\nread_seqbegin()/read_seqretry() lock protection before using it.\n\nNote that arp_reduce() and neigh_reduce() seem to have the same issue\nleft for future patches.","state":0,"publishedAt":"2026-08-15T12:27:10.685+00:00","modifiedAt":"2026-10-16T19:05:48.322+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_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"32a9590a8d30426e3db63e6b20893e47e02576c0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"d0993fc053f29e15cc7c9fe2029df3882a2ab5ab\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"87210054bad82bbae6f483a742dc45722fb47a6b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"ec341bb76d77b4c2948764375ee6bfeef4bb41c3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"ff89415d34c3ab9f5312316423122e664ed3524f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"05f2987f73daa05333fd713d05546142f9f7c5f0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4f67addf158f98f8197e08974966b18480dc751\",\n                            \"lessThan\": \"8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d\",\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_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.151\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\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:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L","score":10,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/32a9590a8d30426e3db63e6b20893e47e02576c0","https://git.kernel.org/stable/c/d0993fc053f29e15cc7c9fe2029df3882a2ab5ab","https://git.kernel.org/stable/c/87210054bad82bbae6f483a742dc45722fb47a6b","https://git.kernel.org/stable/c/d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0","https://git.kernel.org/stable/c/ec341bb76d77b4c2948764375ee6bfeef4bb41c3","https://git.kernel.org/stable/c/ff89415d34c3ab9f5312316423122e664ed3524f","https://git.kernel.org/stable/c/05f2987f73daa05333fd713d05546142f9f7c5f0","https://git.kernel.org/stable/c/8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74475","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74475","identifiers":["CVE-2026-74475"]},"retained":false,"historicalAffected":[]}],"coverage":[]}